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CN107921089A - Parent toxin II variations and application method - Google Patents

Parent toxin II variations and application method Download PDF

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Publication number
CN107921089A
CN107921089A CN201680020883.XA CN201680020883A CN107921089A CN 107921089 A CN107921089 A CN 107921089A CN 201680020883 A CN201680020883 A CN 201680020883A CN 107921089 A CN107921089 A CN 107921089A
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variations
parent toxin
pain
toxin
parent
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Inventor
M.弗林斯帕奇
A.维肯登
R.菲洛斯
Q.许
A.皮伊卡兹
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Janssen Biotech Inc
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Centocor Ortho Biotech Inc
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Abstract

The present invention relates to parent toxin II variations, the polynucleotides of the coding variation and preparation and the method using the variation and the polynucleotides.

Description

Parent toxin-II variations and application method
Cross reference to related applications
The U.S. Provisional Application 62/142069 that the application requires to submit on April 2nd, 2015 according to 35 U.S.C. § 119 (e) Benefit of priority, the disclosure of which is incorporated by reference being incorporated herein.
Technical field
The present invention relates to parent toxin-II variations, encode the synthetic polyribonucleotides of the variation and prepare and use the variation With the method for the synthetic polyribonucleotides.
Background technology
Voltage-gated sodium channel (VGSC) is present in all excitable cells, including cardiac muscle cell, Skeletal Muscle Cell and Axoneuron and peripheral neurons.In neuronal cell, sodium channel is responsible for amplifying threshold depolarization and causes action potential Rapid increase.Equally, generation and propagation of the sodium channel for electric signal in nervous system are most important.It is believed that sodium channel Dysfunction can cause plurality of medical disease (H ü bner and Jentsch, Hum Mol Genet 11: 2435-45,2002), bag Include epilepsy (Yogeeswari et al., Curr Drug Targets 5：589-602,2004), arrhythmia cordis (Tfelt-Hansen Et al., J Cardiovasc Electrophysiol21：107-15,2010), myotonia (Cannon and Bean, J Clin Invest120：80-3,2010) and pain (Cregg et al., J Physiol 588：1897-904,2010).Sodium channel is usual It is the compound of various subunits, basic subunit is pore-forming α-subunit, and single pore-forming α-subunit is enough to play function.
There are nine known member Nav1.1-Nav1.9 of voltage-gated sodium channel α subunit families in human body.Nav1.x is sub- Family can pharmacologically be further divided into two groups, i.e. tetraodotoxin (TTX)-responsive type and TTX- non-sensitive types.Nav1.7 is (also referred to as PN1 or hNE) by SCN9A gene codes, belong to TTX- responsive types, mainly the table in periphery sympathetic neuron and sensory neuron Reach.Nav1.7 accumulates in nerve-fiber terminals, amplifies small-scale threshold depolarization, and leads to as excitatoty threshold value is adjusted Road.
Nav1.7 functions are related with various pain statuses, including acute, inflammatory and/or neuropathic pain.In human body, It was found that (disease is characterized in that limbs cusalgia and inflammation with Primary Erythermalgia (PE) for the gain-of-function mutation of Nav1.7 Disease) (Yang et al., J Med Genet41：171-4,2004) and paroxysmal severe pain disease (PEPD) (Fertleman et al., Neuron52：767-74,2006) it is related.Consistent, non-selective sodium channel inhibitor lidocaine, Mei Xi with this observation Rule and carbamazepine can alleviate symptom (Legroux-Crespel et al., the Ann Dermatol of these pain diseases Venereol 130: 429-33,2003；Fertleman et al., Neuron52: 767-74,2006).
In human body, the function property the lost mutation of Nav1.7 causes rare autosomal recessive disease congenital absence of pain (CIP), it is characterised in that perception of the missing to pain stimulation or to pain stimulation insensitive (Cox et al., Nature completely 444：894-8,2006；Goldberg et al., Clin Genet 71: 311-9,2007；Ahmad et al., Hum Mol Genet 16：2114-21,2007).
Single nucleotide polymorphism and nociceptor excitability and pain sensitivity increase phase in the code area of SCN9A Close.For example, cause the polymorphism rs6746030 that the R1150W in people Nav1.7 is replaced and osteo-arthritic pain, lumbar intervertebral disc cutting Except art pain, phantom limb pain (Reimann et al., Proc Natl Acad Sci USA 107 related to pancreatitis pain： 5148-53,2010).The DRG neurons of expression R1150W saltant types Nav1.7 show discharge frequency increasing in response to depolarising Add (Estacion et al., Ann Neurol 66: 862-6,2009).The fibromyalgia of disability form and SCN9A sodium channels are polymorphic Property rs6754031 it is related, show that some serious fibromyalgia patients can have dorsal root ganglion sodium channelopathy (Vargas- Alarcon et al., BMC Musculoskelet Disord 13：23,2012).
In mouse, the SCN9A gene delections of nociception neuron cause mechanical pain thresholds and hot pain threshold Value reduces, and reduction or disappearance (Nassar et al., Proc Natl Acad the Sci USA 101 of inflammatory pain response： 12706-11,2004).Remove the SCN9A in all sensory neurons and eliminate mechanical nociceptive, inflammatory pain and to heat Reflection, which is retracted, to be responded.The SCN9A removed in sensory neuron and sympathetic neuron eliminates mechanical nociceptive, hot pain and nerve Property pain, and recurred have the function of Nav1.7 lose property mutation crowd in find painless phenotype (Minett et al., Nat Commun 3：791,2012).Therefore, Nav1.7 inhibitor or retarding agent can be used for treatment and various diseases relevant one Serial pain.
Known spider venom includes many sodium channels retardance peptide, including bird catching arachinid toxin I V (HwTx-IV) (Peng etc. People, J Biol Chem 277：47564-71,2002), parent toxin-I, parent toxin-II (Middleton et al., Biochemistry 41：14734-47,2002) and Chile firebird spider toxin I II (Phrixotoxin-III) (Bosmans etc. People, Mol Pharmacol 69：419-29,2006).Need to identify that other Nav1.7 retarding agents are fitted to treat a series of pain Answer disease.In particular it is required that new Nav1.7 resistances selective to the Nav1.7 on other voltage-gated sodium channel isotypes Stagnant dose.
The content of the invention
For one embodiment of the invention to suppress the separated parent toxin-II variations of people's Nav1.7 activity, its Central Plains is malicious Element-II variations have at least one amino acid replacement selected from W7Q and W30L；Wherein residue numbering is according to SEQ ID NO：1 and It is fixed.
Another embodiment of the invention is separated parent toxin-II variations, and wherein the parent toxin-II variations suppress people The activity of Nav1.7, its IC50Value is about 1 × 10-7M or smaller, about 1 × 10-8M or smaller, about 1 × 10-9M or smaller, about 1 × 10-10M or smaller, about 1 × 10-11M or smaller or about 1 × 10-12M or smaller, wherein IC50Value is to stablize expression people Nav1.7 HEK293 cells in there are 25 × 10-6Make in the case of M 3- veratroyls protocevines (3-veratroylveracevine) Used with fluorescence resonance energy transfer (FRET)Tetra membrane depolarizations determination method and measure, wherein the parent toxin- There is II variations W7Q and/or W30L to replace, and wherein residue numbering is according to SEQ ID NO：Depending on 1.
Another embodiment of the invention is separated parent toxin-II variations, and it includes SEQ ID NO：30、40、44、 52、56、56、59、65、78、109、110、111、114、117、118、119、120、121、122、123、124、125、126、 127、128、129、130、131、132、133、134、135、136、137、138、139、140、141、142、143、144、145、 146、147、148、149、150、151、152、153、154、155、156、157、158、159、162、165、166、167、168、 169、170、171、172、173、174、175、177、178、179、180、182、183、184、185、186、189、190、193、 195、197、199、206、207、208、209、210、211、212、213、214、215、216、217、218、224、226、227、 231、232、243、244、245、247、249、252、255、258、261、263、264、265、266、269、270、271、272、 273、274、275、276、277、278、279、280、281、282、283、284、285、286、287、288、289、290、291、 292、293、294、295、296、297、298、299、300、301、302、303、304、305、306、307、308、309、310、 311、312、313、314、315、316、317、318、319、320、321、322、323、324、325、326、332、334、335、 336、337、339、340、341、342、346、351、358、359、364、366、367、368、369、370、371、408、409、 410、411、412、413、414、415、416、417、418、419、420、421、422、423、424、425、426、427、428、 429、430、431、434、435、436、437、438、439、440、441、442、443、444、445、446、447、448、449、 450、451、452、453、454、455、456、457、458、459、460、461、462、463、464、465、466、467、468、 469、470、471、472、473、474、475、476、477、478、479、480、481、482、483、484、485、486、487、 488、489、490、491、492、493、494、495、496、497、498、499、500、501、502、503、504、505、506、 507、508、509、510、511、512、513、514、515、516、517、518、519、520、521、522、523、524、525、 526、527、528、529、530、531、532、533、534、535、536、537、538、539、540、541、542、543、544、 545、546、547、548、549、550、551、552、553、554、555、556、557、558、559、560、561、562、563、 564、565、566、567、568、569、570、571、572、573、574、575、576、577、578、579、580、581、582、 583、584、585、586、587、588、589、590、591、592、593、594、595、596、597、598、599、600、601、 602、603、604、605、606、607、608、609、610、611、612、613、614、615、616、617、618、619、620、 621、622、623、624、625、626、627、628、629、630、631、632、633、634、635、636、637、638、639、 640、641、642、643、644、645、646、647、648、649、650、651、652、653、654、655、656、657、658、 659、660、661、662、663、664、665、666、667、668、669、670、671、672、673、674、675、676、677、 678、679、680、681、682、683、684、685、686、687、688、689、690、691、692、693、694、695、696、 697、698、699、700、701、702、703、704、705、706、707、708、709、710、711、712、713、714、715、 716、717、718、719、720、721、722、723、724、725、726、727、728、729、730、731、732、733、734、 735 or 736 amino acid sequence.
Another embodiment of the invention is separated parent toxin-II variations, it includes with SEQ ID NO：422 (GPYCQKWMQTCDSERKCCEGMVCRLWCKKKLL-COOH) amino acid sequence have 90%, 91%, 92%, 93%, 94%th, the amino acid sequence of 95%, 96%, 97%, 98% or 99% homogeneity；Wherein when residue numbering is according to SEQ ID NO： 1 and timing, the amino acid sequence is at position 7 with L with Q and at position 30.
Another embodiment of the invention is separated fusion protein, and it includes the sheet for being conjugated to half-life extension moiety Parent toxin-II the variations of invention.
Another embodiment of the invention is the separated polynucleotides of the parent toxin-II variations of the coding present invention.
Another embodiment of the invention is the carrier of the separated polynucleotides comprising the present invention.
Another embodiment of the invention is the host cell of the carrier comprising the present invention.
Another embodiment of the invention for prepare the present invention separated parent toxin-II variations method, this method Parent toxin-II the variations that host cell and recycling including the culture present invention are produced by host cell.
Another embodiment of the invention is pharmaceutical composition, and it includes the separated parent toxin-II variations of the present invention With fusion protein and pharmaceutically acceptable excipient.
Another embodiment of the invention for treatment subject Nav1.7 mediation pain method, this method bag Include and apply a effective amount of parent toxin-II variations of the invention or fusion protein to subject in need thereof to treat pain Bitterly.
Brief description of the drawings
Fig. 1 shows to suppress the category amino acid sequence of the parent toxin-II variations of Nav1.7, in FLIPR Tetra determination methods The IC of Nav1.750It is worth for 30nM or smaller.Residue numbering is according to SEQ ID NO：Depending on 1 wild type parent toxin-II.Belong to SEQ ID NO：403.
Fig. 2 shows the IC that Nav1.7 and Nav1.6 suppresses in QPatch determination methods50Value, and by being obtained in QPatch determination methods The IC obtained50(Nav1.6)/IC50(Nav1.7) selectivity of each variation of ratio calculation.SE：Standard error.
Fig. 3 shows to suppress the sequence of the parent toxin-II variations of Nav1.7 and belongs to sequence, in FLIPR Tetra determination methods The IC of Nav1.750It is worth for 30nM or smaller, and its selectivity is 30 times of Nav1.6.The selectivity of each variation is by QPatch The IC obtained in determination method50(Nav1.6)/IC509av1.7) ratio calculation.Residue numbering is according to SEQ ID NO：1 wild type Depending on parent toxin-II.
Fig. 4 A show NV1D3034 (NV1D3034-OH) (SEQ ID NO：78) the thermalgesia mistake induced the CFA- of mouse The effect of quick, after (0) and peptide are applied 1 day (before CFA) and afterwards before being injected by measure CFA in being tested in Hargreaves (1) the paw withdrawal response latency assesses the effect.Using two-way analysis of variance, Bonferroni multiple ratios are then carried out Compared with compared to PBS group * * * P ＜ 0.001.
Fig. 4 B show NV1D3034 (NV1D3034-OH) (SEQ ID NO：78) the thermalgesia mistake induced in the CFA- of mouse The effect of quick middle, the effect are expressed as MPE (maximum possible effect) percentage (MPE%) of the 1st day each dosage after peptide is applied. Using one-way analysis of variance, Bonferroni Multiple range tests are then carried out, compared to PBS group * P ＜ 0.05.
Fig. 5 A show NV1D3368 (NV1D3368-OH) (SEQ ID NO：198) thermalgesia induced the CFA- of mouse The effect of allergy, (0) and peptide are applied 1 day (before CFA) and afterwards before being injected by measure CFA in being tested in Hargreaves Paw withdrawal response latency of (1) assesses the effect afterwards.Using two-way analysis of variance, Bonferroni multiple ratios are then carried out Compared with compared to PBS group * * P ＜ 0.01 and * * * * P ＜ 0.0001.
Fig. 5 B show NV1D3368 (NV1D3368-OH) (SEQ ID NO：198) thermalgesia induced in the CFA- of mouse The effect of in allergy, the effect are expressed as the MPE percentages (MPE%) of the 1st day each dosage after peptide is applied.Using single factor test side Difference is analysed, and Bonferroni Multiple range tests is then carried out, compared to PBS group * P ＜ 0.05 and * * P ＜ 0.01.
Fig. 6 A show NV1D2775-OH (SEQ ID NO：56) the effect of thermal hyperalgesia induced the CFA- of mouse, The paw withdrawal of (1) after (0) and peptide are applied 1 day (before CFA) and afterwards before being injected by measure CFA in being tested in Hargreaves Response latency assesses the effect.Using two-way analysis of variance, Bonferroni Multiple range tests are then carried out, compared to PBS group * * * * P ＜ 0.0001.
Fig. 6 B show NV1D2775-OH (SEQ ID NO：56) work(in the thermal hyperalgesia that the CFA- of mouse is induced Effect, the effect are expressed as the MPE percentages (MPE%) of the 1st day each dosage after peptide is applied.Using one-way analysis of variance, so Bonferroni Multiple range tests are carried out afterwards, compared to PBS group * * * P ＜ 0.001 and * * * * P ＜ 0.0001.
Fig. 6 C show NV1D2775-OH (SEQ ID NO：56) the quick work(of the paraesthesia pain of the CFA- inductions to mouse Effect.The haptic threshold of the metapedes of (1) after (0) and peptide are applied 1 day (before CFA) and afterwards before CFA injections.Using dual factors side Difference is analysed, and Bonferroni Multiple range tests is then carried out, compared to PBS group * * * * P ＜ 0.0001.
Fig. 6 D show NV1D2775-OH (SEQ ID NO：56) the quick work(of the paraesthesia pain of the CFA- inductions to mouse Effect, the effect are expressed as the MPE percentages (MPE%) of the 1st day after peptide is applied.Using one-way analysis of variance, then carry out Bonferroni Multiple range tests, compared to PBS group * * * P ＜ 0.001.
Fig. 7 A show the time course that the thermal hyperalgesia that NV1D2775-OH in mouse CFA models is mediated reverses, by The paw withdrawal response latency of Each point in time before and after measuring CFA in Hargreaves tests and after peptide administration comments Estimate the reverse.Using two-way analysis of variance, Bonferroni Multiple range tests are then carried out, compared to PBS group * * P ＜ 0.01. Shadow region represents compound delivery cycles (0-24hr).
Fig. 7 B show the time course for the quick reverse of paraesthesia pain that NV1D2775-OH is mediated in mouse CFA models, pass through Before and after measurement CFA injections and peptide apply after the haptic threshold of Each point in time assess the reverse.Using it is double because Plain variance analysis, then carries out Bonferroni Multiple range tests, compared to PBS group * * P ＜ 0.01.Shadow region represents compound Delivery cycles (0-24hr).
Fig. 8 shows that NV1D2775-OH generates significant analgesia in mouse hot-plate is tested.Pump be implanted into before and Afterwards, pyrocondensation sufficient incubation period is assessed at 50 DEG C and 55 DEG C.Pump is implanted on incubation period without influence in PBS groups are compareed.Planted in pump After entering one day, compared with PBS groups, prolongation of latency is shown by the NV1D2775-OH mouse treated.Using single factor test variance point Analysis, then carries out Bonferroni Multiple range tests, compared to PBS group * P ＜ 0.05 and * * * * P ＜ 0.0001.
Fig. 9 shows the thermal hyperalgesia that NV1D2775-OH pretreatments protect animal to be induced from the carrageenan of mouse. Paw withdrawal incubation period is measured before the 1st day after being implanted into before pump is implanted into pump, subplantar injection carrageenan.In injection angle fork After dish glue 2 it is small when, 3 it is small when and 4 it is small when measure incubation period again.
Figure 10 shows the schematic surface of the NMR structures of wild type parent toxin-II.Hydrophobic surface shown in left side includes residue W5, M6, W7, L23 and W24.Selective face shows on right side, and including residue S11, E12, K14, E17, G18, L29 and W30. Residue numbering is according to SEQ ID NO：Depending on 1.
Figure 11 A show (the SEQ ID NO of parent toxin-II variations 63955918：422) single is intrathecal in Rat Tall Flick experiment (IT) the effect of after being administered.Contracting tail incubation period of the measurement to thermostimulation at specified time after peptide administration.
Figure 11 B show (the SEQ ID NO of parent toxin-II variations 63955918：422) in Rat Tall Flick experiment the effect of, Represented with area percentage (AUC%) under preceding 120 minutes inner curves after single intrathecal (IT) administration.Using single factor test variance Analysis, then carries out Bonferroni Multiple range tests, compared to PBS group * * * P ＜ 0.001 and * * * * P ＜ 0.0001.
Figure 11 C show (the SEQ ID NO of parent toxin-II variations 63955918：422) in rat hotplate tests (52.5 DEG C) The effect of after single intrathecal (IT) administration.The latent of the nociceptive inputs on hot plate is measured at specified time after peptide administration Phase.
Figure 11 D show (the SEQ ID NO of parent toxin-II variations 63955918：422) in hot plate test the effect of, with Area percentage (AUC%) represents under preceding 120 minutes inner curves after single intrathecal (IT) administration.Using single factor test variance point Analysis, then carries out Bonferroni Multiple range tests, compared to PBS group * * * P ＜ 0.001 and * * * * P ＜ 0.0001.
Figure 11 E show (the SEQ ID NO of parent toxin-II variations 63955918：422) work(in rat gate-Papacostas' tests Effect.By formalin injection rat hindleg induction two-phase withdrawal behavior.Stage i is measured (after formalin by automatics 0-10min) and phase il (11-60min after formalin) number of always shrinking back.Due to group's scale, not to E) unite Meter.
The effect of Figure 12 A show NVlD2775-OH in Rat Tall Flick experiment after single intrathecal (IT) administration.It is administered in peptide Contracting tail incubation period of the measurement to thermostimulation at specified time afterwards.
Figure 12 B show the effect of NV1D2775-OH is in Rat Tall Flick experiment, before after single intrathecal (IT) administration Area percentage (AUC%) represents under 120 minutes inner curves.Using one-way analysis of variance, it is more then to carry out Bonferroni Compare again, compared to PBS group * P ＜ 0.05 and * * P ＜ 0.01.
Figure 12 C show the effect of NV1D2775-OH is after single intrathecal (IT) administration during rat hotplate tests (52.5 DEG C). The incubation period of the nociceptive inputs on hot plate is measured at specified time after peptide administration.
Figure 12 D show the effect of NV1D2775-OH is in rat hotplate experiment, before after single intrathecal (IT) administration Area percentage (AUC%) represents under 120 minutes inner curves.Using one-way analysis of variance, it is more then to carry out Bonferroni Compare again, compared to PBS group * * P ＜ 0.01 and * * * * P ＜ 0.0001.
Figure 12 E show the effect of NV1D2775-OH is in gate-Papacostas' tests.By formalin injection rat hindleg induction Two-phase withdrawal behavior.1st stage (0-10min after formalin) and phase il are measured (after formalin by automatics Number of always shrinking back 11-60min).Using one-way analysis of variance, Bonferroni Multiple range tests are then carried out, in stage i phase Compared with PBS group * * P ＜ 0.01, in phase il compared to PBS group * P ＜ 0.05.
The effect of Figure 13 A show NV1D3034-OH in Rat Tall Flick experiment after single intrathecal (IT) administration.It is administered in peptide Contracting tail incubation period of the measurement to thermostimulation at specified time afterwards.
Figure 13 B show the effect of NV1D3034-OH is in Rat Tall Flick experiment, before after single intrathecal (IT) administration Area percentage (AUC%) represents under 120 minutes inner curves.In t inspections, compared to PBS group * * * P ＜ 0.005.
Figure 13 C show the effect of NV1D3034-OH is after single intrathecal (IT) administration during rat hotplate tests (52.5 DEG C). The incubation period of the nociceptive inputs on hot plate is measured at specified time after peptide administration.
Figure 13 D show the effect of NV1D3034-OH is in rat hotplate experiment, before after single intrathecal (IT) administration Area percentage (AUC%) represents under 120 minutes inner curves.During t is examined, compared to PBS group * * P ＜ 0.01.
Figure 13 E show the effect of NV1D3034-OH is in rat gate-Papacostas' tests.Formalin is injected into rat hindleg Induce two-phase withdrawal behavior.Stage i (0-10min after formalin) and phase il (formal are measured by automatics 11-60min after woods) number of always shrinking back.During t is examined, in stage i compared to PBS group * P ＜ 0.05, phase il compared to PBS group * * P ＜ 0.01.
Figure 14 shows the amino acid alignment of 3 cysteine knot toxin peptide of family.
Embodiment
Cited all publications in this specification, include but not limited to patents and patent applicationss by reference simultaneously Enter herein, as completely provided herein.
In specification and claims singulative used "one", " one kind " and it is " described " include plural, It is really not so unless clearly indicated.
Unless otherwise defined, otherwise the implication of all technical and scientific terms used herein with it is of the art The implication that those of ordinary skill is generally understood is identical.Although this document describes exemplary composition and method, it is similar or It is equal to any composition of composition as described herein and method and method can be used in the practice or test of the present invention.
Term " polypeptide " refers to the molecule for including at least two amino acid residues that polypeptide is formed by peptide key connection.Less than 50 The small polypeptide of a amino acid can be referred to as " peptide ".Polypeptide is also known as " protein ".
Term " polynucleotides " refers to include to be covalently attached by sugar-phosphate backbone or other equivalent covalent chemical modes Nucleotide chain molecule.Double-stranded DNA and single stranded DNA and double-stranded RNA and single stranded RNA are the typical cases of polynucleotides.
Term " complementary series " refer to be anti-parallel to the first separated polynucleotide sequence and comprising with nucleosides more than first Second separated polynucleotide sequence of the nucleotide of the nucleotide complementary in acid sequence.
Term " carrier " is the non-natural multinuclear for referring to replicate or can move between such system in biosystem Thuja acid.Vector polynucleotides generally comprise the cDNA of encoding target protein and other element, such as replication orgin, poly- gland Nucleotide signal or selected marker, its function are to promote the duplication or holding of these polynucleotides in biosystem.Such life The example of thing system may include cell, virus, animal, plant and the biology department reconstructed with the biological components for being capable of replicating vector System.Polynucleotides comprising carrier can be DNA or the hybrid molecule of RNA molecule or these molecules.
Term " expression vector " refers to can be used for instruct to be carried by being present in expression in biosystem or reconstruct biosystem The carrier of the translation of the encoded polypeptide of polynucleotide sequence in body.
As used herein, term " variation " refers to be different from SEQ ID NO：1 wild type parent toxin-II polypeptides it is more Peptide, or there is SEQ ID NO different from coding：The polynucleotides of the polynucleotides of the wild type parent toxin-II of 107 sequence, Difference is one or more modifications, such as displacement, insertion or the missing of nucleotide or amino acid.
Throughout the specification, the numbering for the residue being replaced in parent toxin-II variations corresponds to it in SEQ ID NO：1 Wild type parent toxin-II position.For example, " Y1A " in specification refers to correspond to SEQ ID NO：The former poison of 1 wild type The tyrosine of the residue positions of position 1 is by alanine substitution in element-II.
" complementary DNA " or " cDNA " refers to well known synthetic polyribonucleotides, arrangement and the natural maturation of its sequential element Identical, the continuous extron present in the genomic DNA of the arrangement of sequential element present in mRNA species, and introne between two parties It is removed.The codon of coding initial methionine may be present or absent in cDNA.For example, reverse transcription or conjunction can be passed through CDNA is synthesized into gene cassette.
As used herein, term " synthesis " or " non-natural " refer to non-naturally occurring polynucleotides or peptide molecule.
As used herein, " Nav1.7 " (also referred to as hNE or PN1) or " hNav1.7 " refer to well known people sodium channel egg White 9 type subunit α, it is with GenBank accession number NP_002968.1 and SEQ ID NO：Sequence shown in 79.
As used herein, term " wild type parent toxin-II " or " wild type ProTx-II " refers to tarantula (the green velvet of Chile Tarantula (Thrixopelma pruriens) (the green velvet tarantula of Peru)) toxin peptide, it is with amino acid sequence YCQKWMWTCDSERKCCEGMVCRLWCKKKLW-COOH(SEQ ID NO：1), as Middleton et al. exists Biochemistry 41(50)：14734-47, described in 2002.
As used herein, term " restructuring parent toxin-II " or " restructuring ProTx-II " refers to express parent toxin-II fusion eggs Restructuring parent toxin-II that is white and then being cut and obtained to it, it is with SEQ ID NO：Shown in 2 GPYCQKWMWTCDSERKCCEGMVCRLWCKKKLW-OH sequences.Compared with wild type parent toxin-II, restructuring parent toxin-II bags Extend (residue G and P) containing two amino acid N-terminals.
As used herein, " activity of retardance people Nav1.7 " or " activity for suppressing people Nav1.7 " refer to the original poison of the present invention Element-II variations reduce the ability of the membrane depolarization of veratridine (3- veratroyls protocevine) induction, are using fluorescence resonance energy Shift (FRET)IC in the analysis of Tetra membrane depolarizations50Value is about 1 × 10-7M or smaller, wherein veratridine lure The depolarising led with FRET signals reduce measure, the measurement using DISBAC2 (3) ([it is double-(1,3- diethyl sulfide is for barbital Acid) cyclonite oxonols]) acceptor is used as, and PTS18 (8- octadecyl oxygen pyrenes -1,3,6- trisulfonic acids trisodium) is as confession Body, by the excited donor under 390nm-420nm, and measures in the cell line for stablizing expression people Nav1.7 under 515nm-575nm FRET carry out.Parent toxin-II the variations of the present invention block the ability of people's Nav1.7 activity that QPatch electro physiologies can also be used Learn and be measured under single or some parent toxin-II variant concentrations according to the scheme described in embodiment 3.When the original of the present invention Toxin I I variant suppresses using Nav1.7 electric currents of the QPatch as described in embodiment 3 measured by measure scheme at least about 25%th, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 91%, 92%th, 93%, 94%, 95%, 96%, 97%, 98%, 99% or 100% when, it blocks the activity of people Nav1.7.
As used herein, "Tetra membrane depolarizations determination method " refers to the determination method described in embodiment 3.
As used herein, " QPatch determination methods " or " QPatch electrophysiology determination method " refers to the survey described in embodiment 3 Determine method.
As used herein, two kinds of parent toxin-II Variant amino acid sequences that term " substantially the same " refers to be compared are It is identical or there is " non-limiting difference ".Non-limiting difference is 1,2,3,4,5,6 in parent toxin-II Variant amino acid sequences Or 7 amino acid are replaced, and this displacement does not adversely affect the property of peptide.With parent toxin disclosed herein- The substantially the same amino acid sequence of II variations is in the range of the application.In some embodiments, sequence identity can be about 80%th, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%th, 96%, 97%, 98%, 99% or higher.Percentage identity can be for example by using Vector NTI v.9.0.0 The default setting of the AlignX modules of (Invitrogen, Carslbad, CA) is determined by comparison.The protein of the present invention Sequence may be used as search sequence to be retrieved for public or patent database, such as to identify correlated series.For into The exemplary process of the such retrieval of row is XBLAST the or BLASTP programs (http_ //www_ncbi_nlm/ using default setting ) or GenomeQuest nih_govTM(GenomeQuest, Westborough, Ma) software kit.
As used herein, the abbreviation of natural amino acid is as shown in table 1a.
Table 1.
Amino acid Three-letter codes Single letter code
Alanine Ala A
Arginine Arg R
Asparagine Asn N
Aspartic acid Asp D
Cysteine Cys C
Glutamic acid Glu E
Glutamine Gln Q
Glycine Gly G
Histidine His H
Isoleucine Ile I
Leucine Leu L
Lysine Lys K
Methionine Met M
Phenylalanine Phe F
Proline Pro P
Serine Ser S
Threonine Thr T
Tryptophan Trp W
Tyrosine Tyr Y
Valine Val V
The present invention provides active separated parent toxin-II (ProTx-II) variant polypeptide, the volume for suppressing people Nav1.7 The code polynucleotides of the polypeptide, carrier, host cell and the present invention polynucleotides and polypeptides application method.The present invention's Polypeptide suppress Nav1.7 activation caused by depolarising/electric current, therefore available for treatment with the relevant various illnesss of pain and with Sensory neuron or the relevant illness of sympathetic neuron dysfunction.
The variation of the present invention is effective inhibitor of Nav1.7.The present invention is at least partially based on following discovery：The former poison of displacement Some residues enhancing selectivity, raising synthesis yield and/or homogenieity in element-II, without becoming to the parent toxin-II generated The effect of body adversely affects, the particularly displacement of W7 and M19, and the displacement plus residue Y1 and S11, along with residue (residue numbering is according to SEQ ID NO for the displacement of E12, R22：Depending on 1).For example, the displacement of position W7 and W30 enhance former poison Element-II variations fold and improve yield.The displacement of position S11, E12, K14, E17, G18, L29 and W30 improve gained Selectivity of the parent toxin-II variations to Nav1.7.
An embodiment (being included in the numbered embodiment of following band) disclosed in this invention is separated original Toxin I I variant, the wherein parent toxin-II variations suppress the activity of people Nav1.7, its IC50Value is about 1 × 10-7M or smaller, About 1 × 10-8M or smaller, about 1 × 10-9M or smaller, about 1 × 10-10M or smaller, about 1 × 10-11M or smaller or about 1 × 10-12M or smaller, wherein IC50Value is that there are 25 × 10 in the HEK293 cells for stablizing expression people Nav1.7-6M 3- veratroyl lamb's-quarters Used in the case of reed cevine using fluorescence resonance energy transfer (FRET)Tetra membrane depolarizations determination method and survey Amount.
Another embodiment (being included in the numbered embodiment of following band) disclosed in this invention is separated Parent toxin-II variations, the wherein parent toxin-II variations suppress the activity of people Nav1.7, its IC50Value is about 1 × 10-7M or more It is small, about 1 × 10-8M or smaller, about 1 × 10-9M or smaller, about 1 × 10-10M or smaller, about 1 × 10-11M or smaller or about 1 × 10-12M or smaller, wherein IC50Value is that there are 25 × 10 in the HEK293 cells for stablizing expression people Nav1.7-6M 3- veratroyls Used in the case of protocevine using fluorescence resonance energy transfer (FRET)Tetra membrane depolarizations determination method and Measurement, wherein parent toxin-II variations have at least one amino acid replacement selected from W7Q and W30L；Wherein residue numbering according to SEQ ID NO：Depending on 1.
Another embodiment (being included in the numbered embodiment of following band) disclosed in this invention is suppression people Separated parent toxin-II the variations of Nav1.7 activity, wherein parent toxin-II variations have at least one selected from W7Q and W30L Amino acid replacement；Wherein residue numbering is according to SEQ ID NO：Depending on 1.
In some embodiments disclosed herein, it is included in the numbered embodiment of following band, parent toxin-II Variation is replaced with W7Q.
In some embodiments disclosed herein, it is included in the numbered embodiment of following band, parent toxin-II Variation is replaced with W30L.
In some embodiments disclosed herein, it is included in the numbered embodiment of following band, parent toxin-II There is variation W7Q and W30L to replace.
In some embodiments disclosed herein, it is included in the numbered embodiment of following band, when according to reality Apply scheme described in example 3 using QPatch determination methods measurement Nav1.7 activity when, parent toxin-II variations suppress Nav1.7 activity extremely Few 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 91%, 92%th, 93%, 94%, 95%, 96%, 97%, 98%, 99% or 100%.
In some embodiments disclosed herein, it is included in the numbered embodiment of following band, when residue is compiled Number according to SEQ ID NO：1 and timing, parent toxin-II variations one or more resi-dues Y1, W7, S11, E12, K14, There is displacement at E17, G18, R22, L29 and W30.
Displacement at the Y1 of position improves the effect of people Nav1.7.
Displacement at the W7 of position improves the folding of parent toxin-II variations and protein yields.
Displacement at the S11 of position improves the selectivity to people Nav1.7.
Displacement at the E12 of position improves the selectivity to people Nav1.7.
Displacement at the K14 of position improves the selectivity to people Nav1.7.
Displacement at the E17 of position improves the selectivity to people Nav1.7.
Displacement at the G18 of position improves the selectivity to people Nav1.7.
Displacement at the L29 of position improves the selectivity to people Nav1.7.
Displacement at the W30 of position improves parent toxin-II variations and folds and protein yields and the selectivity to Nav1.7.
Another embodiment (being included in the numbered embodiment of following band) disclosed in this invention is separated Parent toxin-II variations, it includes sequence YCQKWMQTCDSERKCCEGMVCRLWCKKKLW-COOH (SEQ ID NO：416)；Its Middle residue Y1, S11, E12, K14, E17, G18, L29 and/or W30 are by any other amino acid shown in table 1 or optionally have N- ends extend or the alpha-non-natural amino acid displacement of C- ends extension.
Another embodiment (being included in the numbered embodiment of following band) disclosed in this invention is separated Parent toxin-II variations, it includes sequence YCQKWMQTCDSERKCCEGMVCRLWCKKKLL-COOH (SEQ ID NO：422)；Its Middle residue Y1, S11, E12, K14, E17, G18, M19, L29 and/or W30 are by any other amino acid shown in table 1 or optionally Alpha-non-natural amino acid displacement with the extension of N- ends or the extension of C- ends.
In some embodiments, it is included in the numbered embodiment of following band, parent toxin-II of the present invention Variation includes at least one alpha-non-natural amino acid.
Alpha-non-natural amino acid includes amino Beta-alanine (β-Ala) and other omega-amino acids such as 3- alanines (Dap), 2,3- diaminopropionic acids (Dpr), 4-Aminobutanoicacid etc.；α-aminoacid (Aib)；ε-aminocaproic acid (Aha)；δ-ammonia Base valeric acid (Ava)；Sarcosine or methyl amimoacetic acid (MeGly)；Ornithine (Om)；Citrulling (Cit)；Tert-butylalanine (t-BuA)；T-butylglycine (t-BuG)；N- methyl isoleucines (MeIle)；Phenylglycine (Phg)；The third ammonia of cyclohexyl Sour (Cha)；Nor-leucine (Nle)；2- naphthylalanines (2-NaI)；4- chlorophenylalanines (Phe (4-Cl))；The third ammonia of 2- fluorobenzene Sour (Phe (2-F))；3- fluorophenylalanine (Phe (3-F))；4- fluorophenylalanine (Phe (4-F))；Penicillamine (Pen)；1,2,3, 4- tetrahydroisoquinoline -3- carboxylic acids (Tic)；α -2- thienylalanines (Thi)；Methionine sulfoxide (MSO)；N (ω)-methyl-L- Arginine；N (ω), N (ω)-dimethyl-L-arginine (asymmetry)；4- guanidine radicals-L-phenylalanine；L-Lys(N-ε-(N-α- Palmityl-L- γ-glutamyls)；Altheine acyl group -4- butylamines；L- glutamyl -4- butylamines；It is high-precision Propylhomoserin (hArg)；N-acetyllysine (AcLys)；2,3- diaminobutyric acids (Dab)；2,4-diamino-butanoic (Dbu)；To amino Phenylalanine (Phe (pNH2))；N- methylvalines (MeVal)；Homocysteine (hCys) and homoserine (hSer)；4- Bromophenyl alanine (Phe (4-Br)；5- Australia is for tryptophan (Trp (5-Br))；3- chlorine tyrosine (Tyr (3-C1)) or the third ammonia of β-chlorine Acid.
Another embodiment (being included in the numbered embodiment of following band) disclosed in this invention is separated Parent toxin-II variations, it includes sequence
X1X2X3CX4X5WX6QX7CX8X9X10X11X12CCX13X14X15X16CX17LWCX18KKLX19(SEQ ID NO：432),
X1For G, P, A or missing；
X2For P, A or missing；
X3For S, Q, A, R or Y；
X4For Q, R, K, A, S or Y；
X5For K, S, Q or R；
X6For M or F；
X7For T, S, R, K or Q；
X8For D, T or asparaginyl- -4- butylamines；
X9For S, A, R, I or V；
X10For E, R, N, K, T, Q, Y or glutamyl -4- butylamines；
X11For R or K；
X12For K, Q, S, A or F；
X13For E, Q, D, L, N or glutamyl -4- butylamines；
X14For G, Q or P；
X15For M or F；
X16For V or S；
X17For R, T or N- ω-methyl-L-arginine；And
X18For K or R；And
X19For W or L,
Separated parent toxin-II the variations optionally have the extension of N- ends or the extension of C- ends.
Another embodiment (being included in the numbered embodiment of following band) disclosed in this invention is separated Parent toxin-II variations, it includes sequence X1X2X3CQKWMQTCDX4X5RX6CCX7X8X9VCRLWCKKKX10X11(SEQ ID NO： 737)；
Wherein
X1For G, P, A or missing；
X2For P, A or missing；
X3For S, Q, A, R or Y；
X4For S, A, R, I or V；
X5For E, R, N, K, T, Q, Y or glutamyl -4- butylamines；
X6For K, Q, S, A or F；
X7For E, Q, D, L, N or glutamyl -4- butylamines；
X8For G, Q or P；
X9For M or F；
X10For L, V；And
X11For W or L.
In some embodiments disclosed herein, it is included in the numbered embodiment of following band, parent toxin-II Variation suppresses the activity of people Nav1.7, its IC50Value is about 1 × 10-7M or smaller, wherein IC50Value is to stablize expression people There are 25 × 10 in the HEK293 cells of Nav1.7-6Fluorescence resonance energy transfer is used in the case of M 3- veratroyl protocevines (FRET) useTetra membrane depolarizations determination method and measure.
In some embodiments disclosed herein, it is included in the numbered embodiment of following band, when according to reality Apply scheme described in example 3 using QPatch determination methods measurement Nav1.7 activity when, parent toxin-II variations suppress Nav1.7 activity extremely Few 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 91%, 92%th, 93%, 94%, 95%, 96%, 97%, 98%, 99% or 100%.
In some embodiments disclosed herein, it is included in the numbered embodiment of following band, N- prolongs end Stretch and include SEQ ID NO：372nd, 373,374,375,376,377,378,379,380,381,382,383,384 or 385 ammonia Base acid sequence.
In some embodiments disclosed herein, it is included in the numbered embodiment of following band, C- prolongs end Stretch and include SEQ ID NO：374th, 386,387,388,389,390,391,392,393,394,395,396 or 397 amino acid Sequence.
In some embodiments disclosed herein, be included in the numbered embodiment of following band, N- ends and/ Or C- ends extend through connector and are conjugated to parent toxin-II variations.
In some embodiments disclosed herein, it is included in the numbered embodiment of following band, connector includes SEQ ID NO：383rd, 392,398,399,400,401 or 402 amino acid sequence.
In some embodiments disclosed herein, it is included in the numbered embodiment of following band, N- prolongs end Stretch by SEQ ID NO：372nd, 373,374,375,376,377,378,379,380,381,382,383,384 or 385 amino Acid sequence forms.
In some embodiments disclosed herein, it is included in the numbered embodiment of following band, C- prolongs end Stretch by SEQ ID NO：374th, 386,387,388,389,390,391,392,393,394,395,396 or 397 amino acid sequence Row composition.
In some embodiments disclosed herein, it is included in the numbered embodiment of following band, connector is by SEQ ID NO：383rd, 392,398,399,400,401 or 402 amino acid sequence composition.
Another embodiment (being included in the numbered embodiment of following band) disclosed in this invention is separated Parent toxin-II variations, it includes sequence
X1X2X3CX4X5WX6QX7CX8X9X10X11X12CCX13X14FX15CX16LWCX17KKL W(SEQ ID NO：403), its In
X1For G, P, A or missing；
X2For P, A or missing；
X3For S, Q, A, R or Y；
X4For Q, R, K, A or S；
X5For K, S, Q or R；
X6For M or F；
X7For T, S, R, K or Q；
X8For D or T；
X9For S, A or R；
X10For E, R, N, K, T or Q；
X11For R or K；
X12For K, Q, S or A；
X13For E, Q or D；
X14For G or Q；
X15For V or S；
X16For R or T；And
X17For K or R；
Separated parent toxin-II the variations optionally have the extension of N- ends or the extension of C- ends,
Wherein polypeptide suppresses the activity of people Nav1.7, its IC50Value is about 1 × 10-7M or smaller, wherein IC50Value is steady Surely there are 25 × 10 in the HEK293 cells of expression people Nav1.7-6Fluorescence resonance is used in the case of M 3- veratroyl protocevines Energy transfer (FRET) usesTetra membrane depolarizations determination method and measure.
Parent toxin-II variations (being included in the numbered embodiment of following band) disclosed in this invention are effective Nav1.7 inhibitor.In the depolarising of veratridine induction suppresses determination method, parent toxin-II (SEQ ID NO are recombinated：2) for People Nav1.7 has about 4 × 10-9The IC of M50Value, the determination method useTetra instruments (Molecular Devices FRET (fluorescence resonance energies turn in the cell of expression Nav1.7) are stablized by the experiment measurement being described in detail in embodiment 3 Move) reduction.IC in said determination method and experiment 350Value is about 30 × 10-9M or smaller, i.e., restructuring parent toxin-II's IC50When within 10 times of value, parent toxin-II variations are " effective " Nav1.7 inhibitor.For clarity, 30 × 10-9M's IC50Equivalent to 3.0 × 10-8The IC of M50。
Parent toxin-II variant polypeptides (being included in the numbered embodiment of following band) disclosed in this invention can lead to Cross chemical synthesis preparation, the Solid phase peptide synthesis such as carried out on automatic peptide synthesizer.Alternatively, polypeptide of the invention can pass through Using Cell free expression system (expression system such as based on granulophilocyte dissolved matter) or by recombinant expression system from volume The polynucleotides of code polypeptide obtain.Those skilled in the art will recognize that other technologies for being used to obtain polypeptide of the present invention. In illustrative methods, the parent toxin-II variations of the present invention are generated in the following way：These variations are expressed as human seralbumin egg (HSA) fusion protein in vain, the fusion protein utilize the connector such as (GGGGS) rich in glycine4(SEQ ID NO：80) or (GGGGS)6(SEQ ID NO：81) the connector such as HRV3C that can be cut by protease, should be coupled to rich in the connector of glycine Identification sequence LEVLFQGP (HRV3C connectors) (SEQ ID NO of protease (ERC group virus recombinant type 143C protease)：82), And with the expressed fusion protein of HRV3C protease cutting, parent toxin-II variant peptides are recombinated with release.Hexahistine (SEQ ID NO：108) or other labels can be used for promoting to be purified using well known method.
Parent toxin-II variations (being included in the numbered embodiment of following band) disclosed in this invention can be used herein The method purifying.In an illustrative methods, parent toxin-II variations of the invention are expressed as HSA fusion proteins, and by HRV3C protease is cut, and Solid Phase Extraction as described herein (SPE) method can be used to purify the variation.
Usually (being included in the numbered embodiment of following band) disclosed herein is realized in nucleic acid level optionally The generation of parent toxin-II variations and the life of parent toxin-II variant fusion proteins with the extension of N- ends and/or the extension of C- ends Into.It can be used and degeneracy widow's core is utilized according to the chemical gene synthesis of 6,521,427 and 6,670,127 the method for United States Patent (USP) Variation needed for thuja acid generation carrys out synthetic polyribonucleotides, or by standard PCR clones and mutagenesis come synthetic polyribonucleotides.Variation storehouse It can be generated by Standard cloning techniques, the polynucleotides for encoding parent toxin-II variations are cloned into carrier and are used to express.
When with SEQ ID NO：When 1 wild type parent toxin-II is compared, parent toxin-II variations (bag disclosed in this invention Include in the numbered embodiment of following band) it can be compared comprising 1 wild type parent toxin-II, parent toxin-II variations can include example The other N- ends such as produced by clone and/or expressional scheme and/or C- end amino acids.For example, variation is expressed as The cleavable peptides of HSA- connectors-HRV3C-parent toxin-II variant fusion proteins, then can become each parent toxin-II from HSA cuttings The N- ends of body are combined with other two residues such as G and P.
Parent toxin-II variations disclosed in this invention are tested using method described herein (to be included in following with numbering Embodiment in) suppress the ability of people Nav1.7.Exemplary assay suppresses determination method for the depolarising of veratridine induction, should The reduction of FRET (fluorescence resonance energy transfer) in the cell for expressing Nav1.7 is stablized in determination method measurement.Another exemplary mensuration Method uses electrophysiology record with using the electric current of well known patch clamp technique and the techniques described herein measurement Nav1.7 mediations Change.
Another embodiment of the invention (is included in following band for separated parent toxin-II variations disclosed herein In numbered embodiment), it includes SEQ ID NO：3、4、5、6、7、8、9、10、11、12、13、14、15、16、17、18、 19、20、21、22、23、24、25、26、27、28、29、30、31、32、33、34、35、36、37、38、39、40、41、42、43、 44、45、46、47、48、49、50、51、52、53、54、55、56、57、58、59、60、61、62、63、64、65、66、67、68、 69、70、71、72、73、74、75、76、77、78、109、110、111、112、113、114、115、116、117、118、119、 121、122、123、124、125、126、127、128、129、130、131、132、133、134、135、136、137、138、139、 140、141、142、143、144、145、146、147、148、149、150、151、152、153、154、155、156、157、158、 159、160、161、162、163、164、165、166、167、168、169、170、171、172、173、174、175、176、177、 178、179、180、181、182、183、184、185、186、187、188、189、190、191、192、193、194、195、196、 197、198、199、200、201、202、203、204、205、206、207、208、209、210、211、212、213、214、215、 216、217、218、219、220、221、222、223、224、225、226、227、228、229、230、231、232、233、234、 235、236、237、238、239、240、241、242、243、244、245、246、247、248、249、250、251、252、253、 254、256、257、258、259、260、261、262、263、264、265、266、267、268、269、270、271、272、273、 274、275、276、277、278、279、280、281、282、283、284、285、286、287、288、289、290、291、292、 293、294、295、296、297、298、299、300、301、302、303、304、305、306、307、308、309、310、311、 312、313、314、315、316、317、318、319、320、321、322、323、324、325、326、327、328、329、330、 331、332、333、334、335、336、337、338、339、340、341、342、343、344、345、346、347、348、349、 350、351、352、353、354、355、35、357、358、359、360、361、362、363、364、365、366、367、368、 369、370、371、408、409、410、411、412、413、414、415、416、417、418、419、420、421、422、423、 424、425、426、427、428、429、430、431、434、435、436、437、438、439、440、441、442、443、444、 445、446、447、448、449、450、451、452、453、454、455、456、457、458、459、460、461、462、463、 464、465、466、467、468、469、470、471、472、473、474、475、476、477、478、479、480、481、482、 483、484、485、486、487、488、489、490、491、492、493、494、495、496、497、498、499、500、501、 502、503、504、505、506、507、508、509、510、511、512、513、514、515、516、517、518、519、520、 521、522、523、524、525、526、527、528、529、530、531、532、533、534、535、536、537、538、539、 540、541、542、543、544、545、546、547、548、549、550、551、552、553、554、555、556、557、558、 559、560、561、562、563、564、565、566、567、568、569、570、571、572、573、574、575、576、577、 578、579、580、581、582、583、584、585、586、587、588、589、590、591、592、593、594、595、596、 597、598、599、600、601、602、603、604、605、606、607、608、609、610、611、612、613、614、615、 616、617、618、619、620、621、622、623、624、625、626、627、628、629、630、631、632、633、634、 635、636、637、638、639、640、641、642、643、644、645、646、647、648、649、650、651、652、653、 654、655、656、657、658、659、660、661、662、663、664、665、666、667、668、669、670、671、672、 673、674、675、676、677、678、679、680、681、682、683、684、685、686、687、688、689、690、691、 692、693、694、695、696、697、698、699、700、701、702、703、704、705、706、707、708、709、710、 711、712、713、714、715、716、717、718、719、720、721、722、723、724、725、726、727、728、729、 730th, 731,732,733,734,735 or 736 amino acid sequence.
Parent toxin-II variations (being included in the numbered embodiment of following band) disclosed in this invention can inhibit people Nav1.7, its IC50Value is about 1 × 10-7M or smaller, about 1 × 10-8M, about 1 × 10-9Or smaller, about 1 × 10-10M or smaller, about 1×10-11M or smaller, or about 1 × 10-12M or smaller.Show IC50The exemplary variation of the scope of value is with SEQ ID NO：30、40、44、52、56、56、59、65、78、109、110、111、117、118、119、120、121、122、123、124、 125、126、127、128、129、131、132、133、134、135、136、137、138、139、140、141、142、143、144、 145、146、147、148、149、150、151、152、153、154、155、156、157、158、159、162、165、166、167、 168、169、170、171、172、173、174、175、177、178、179、180、182、183、184、185、186、189、190、 193、195、197、199、206、207、208、209、210、211、212、213、214、215、216、217、218、224、226、 227、231、232、243、244、245、247、249、252、255、258、261、263、264、265、266、269、270、271、 272、273、274、275、276、277、278、279、280、281、282、283、284、285、286、287、288、289、290、 291、292、293、294、295、296、297、298、299、300、301、302、303、304、305、306、307、308、309、 310、311、312、313、314、315、316、317、318、319、320、321、322、323、324、325、326、332、334、 335、336、337、339、340、341、342、346、351、358、359、364、366、367、368、408、409、410、411、 412nd, 413,414,415,416,417,418,419,420,421,422,423,424,425,426,427,428,429,430 or The variation of amino acid sequence shown in 431.
In some embodiments disclosed herein, it is included in the numbered embodiment of following band, when according to reality Apply scheme described in example 3 using QPatch determination methods measurement Nav1.7 activity when, parent toxin-II variations suppress Nav1.7 activity extremely Few 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 91%, 92%th, 93%, 94%, 95%, 96%, 97%, 98%, 99% or 100%.Suppress Nav1.7 activity in QPatch determination methods At least 25% exemplary variation is with SEQ ID NO：109、133、408、409、410、412、419、420、421、422、 423、423、424、425、426、427、427、428、429、430、431、431、434、436、437、438、439、440、441、 442、444、446、447、448、450、452、453、455、456、459、460、461、462、463、464、465、466、468、 469、470、471、473、474、476、477、478、479、480、482、483、485、486、487、490、491、492、494、 495、496、497、498、499、500、502、504、505、507、508、510、511、512、514、516、517、518、519、 521、522、523、524、526、529、531、532、533、537、546、554、557、559、560、561、562、563、566、 571、579、588、589、590、591、592、593、594、595、596、597、598、599、600、601、602、603、604、 605、606、607、608、609、610、611、621、622、632、633、634、635、636、637、638、639、670、671、 672nd, amino acid sequence shown in 673,674,675,676,677,678,679,680,681,682,683,684 and 685 Variation.
Table 2, table 3, table 14, table 18 and table 2 show the sequence of selected parent toxin-II variations.
Table 2.
Table 3.
In some embodiments disclosed herein, it is included in the numbered embodiment of following band, separated original Toxin I I variant suppresses the activity of people Nav1.7, its IC50Value is about 3 × 10-8M or smaller.
In some embodiments disclosed herein, it is included in the numbered embodiment of following band, separated original Toxin I I variant suppresses the activity of people Nav1.7, its IC50Value is between about 3 × 10-8M to about 1 × 10-9Between M.
Another embodiment (being included in the numbered embodiment of following band) disclosed in this invention is separated Parent toxin-II variations, the variation include amino acid sequence GPQCX1X2WX3QX4CX5X6X7X8X9CCX10X11X12X13CX14LWCX15K KLL(SEQ ID NO：433), wherein
X1For Q, R, K, A or S；
X2For K, S, Q or R；
X3For M or F；
X4For T, S, R, K or Q；
X5For D or T；
X6For S, A or R；
X7For E, R, N, K, T or Q；
X8For R or K；
X9For K, Q, S or A；
X10For E, Q or D；
X11For G or Q；
X12For F or M；
X13For V or S；
X14For R or T；And
X15For K or R.
Suppress the activity of people Nav1.7 and with about 30 × 10-9The IC of M or smaller50Exemplary parent toxin-II the variations of value To include SEQ ID NO：56、78、111、114、117、118、119、122、123、129、130、131、132、133、134、 135、136、138、139、140、141、142、145、146、147、149、150、151、152、153、154、156、158、159、 165、172、173、175、177、178、183、184、185、186、189、190、193、197、199、207、210、211、216、 217th, the change of 224,266,273,282,335,408,409,410,422,424,425,426,427 and 428 amino acid sequence Body.
In some embodiments disclosed herein, it is included in the numbered embodiment of following band, separated original Toxin I I variant optionally suppresses people Nav1.7.With recombinating parent toxin-II (SEQ ID NO：2) when comparing, original of the invention Toxin I I variant can have Nav1.7 bigger selectivity.In QPatch electrophysiology determination methods ,-II pairs of parent toxin is recombinated In the IC of Nav1.750It is about 2.2 × 10-9M, and for the IC of Nav1.650It is about 62 × 10-9M, therefore for Nav1.6's IC50It is the IC for Nav1.750About 28 times." selectivity " used herein or " selection " or " selective bigger " or " choosing Block to selecting property " or " optionally suppress " refer to IC of the parent toxin-II variations for Nav1.650With for Nav1.7's IC50Ratio (IC50(Nav1.6)/IC50(Nav1.7)) 30 are equal to or greater than about.It can use for similar described in Nav1.7 Method in QPatch electrophysiology determination methods using stablize expression Nav1.6 cell line measure for Nav1.6 IC50。
It can be mutagenized in parent toxin-II and improving selective resi-dues includes 7,11,12,14,17,18 and of residue 19, and optionally residue 1,20,22 and 26, (residue numbering is according to SEQ ID NO：Depending on 1).Improve the exemplary of selectivity It is replaced into Y1Q, W7Q, S11R, S11A, E12T, M19F, V20S, R22T and K26R.Exemplary parent toxin-the II selectively improved Variation is SEQ ID NO：56、59、65、78、111、114、117、118、119、121、122、123、129、130、133、150、 190th, 217,281,324,325 or 326 variation.
Another embodiment (being included in the numbered embodiment of following band) disclosed in this invention is separated Parent toxin-II variations, the variation include sequence GPX1CQKWMQX2CDX3X4RKCCX5GFX6CX7LWCX8KKLW(SEQ ID NO： 405)；Wherein
X1For Y, Q, A, S or R；
X2For T or S；
X3For S, R or A；
X4For E, T or N；
X5For E or Q；
X6For V or S；
X7For R or T；And
X8For K or R；
Wherein parent toxin-II variations suppress the activity of people Nav1.7, its IC50Value is about 3 × 10-8M or smaller, and select Suppress to selecting property people Nav1.7.
In some embodiments disclosed herein, it is included in the numbered embodiment of following band, separated original Toxin I I variant includes sequence GPQCQKWMQX1CDX2X3RKCCX4GFX5CX6LWCX8KKLW(SEQ ID NO：406)；Wherein
X1For T or S；
X2For S, R or A；
X3For E, T or N；
X4For E or Q；
X5For V or S；
X6For R or T；And
X7For K or R.
Another embodiment (being included in the numbered embodiment of following band) disclosed in this invention is separated Parent toxin-II variations, the variation include and SEQ ID NO：422 amino acid sequence (GPYCQKWMQTCDSERKCCEGMVCRLWCKKKLL-COOH) have 90%, 91%, 92%, 93%, 94%, 95%, 96%th, the amino acid sequence of 97%, 98% or 99% homogeneity；Wherein
When residue numbering is according to SEQ ID NO：1 and timing, amino acid sequence has Q at position 7, and in position 30 Place has L；And
The polypeptide suppresses the activity of people Nav1.7.
When compared with wild type parent toxin-II, the parent toxin-II variations with displacement W7Q and W30L are with improvement Folding, yield and selectivity.
Another embodiment (being included in the numbered embodiment of following band) disclosed in this invention is separated Parent toxin-II variations, the variation include and SEQ ID NO：78 amino acid sequence (GPQCQKWMQTCDRERKCCEGFVCTLWCRKKLW-COOH) have 90%, 91%, 92%, 93%, 94%, 95%, 96%th, the amino acid sequence of 97%, 98% or 99% homogeneity；Wherein
When residue numbering is according to SEQ ID NO：1 and timing, amino acid sequence has Q at position 1, the tool at position 7 There is Q, and there is F at position 19；
Polypeptide suppresses the activity of people Nav1.7, its IC50Value is about 30 × 10-9M or smaller, wherein IC50Value is to stablize table There are 25 × 10 in the HEK293 cells of intelligent Nav1.7-6Fluorescence resonance energy is used in the case of M 3- veratroyl protocevines (FRET) is shifted to useTetra membrane depolarizations determination method and measure；And
The polypeptide optionally suppresses Nav1.7.
In some embodiments disclosed herein, it is included in the numbered embodiment of following band, separated original Toxin I I variant has carboxylic acid, acid amides, methyl nitrosourea or butyl amide group in C- ends.C- is end modified can be by normal The synthetic method generation of rule.
Another embodiment (being included in the numbered embodiment of following band) disclosed in this invention is separated Fusion protein, it includes SEQ ID NO：3、4、5、6、7、8、9、10、11、12、13、14、15、16、17、18、19、20、21、 22、23、24、25、26、27、28、29、30、31、32、33、34、35、36、37、38、39、40、41、42、43、44、45、46、 47、48、49、50、51、52、53、54、55、56、57、58、59、60、61、62、63、64、65、66、67、68、69、70、71、 72、73、74、75、76、77、78、109、110、111、112、113、114、115、116、117、118、119、121、122、123、 124、125、126、127、128、129、130、131、132、133、134、135、136、137、138、139、140、141、142、 143、144、145、146、147、148、149、150、151、152、153、154、155、156、157、158、159、160、161、 162、163、164、165、166、167、168、169、170、171、172、173、174、175、176、177、178、179、180、 181、182、183、184、185、186、187、188、189、190、191、192、193、194、195、196、197、198、199、 200、201、202、203、204、205、206、207、208、209、210、211、212、213、214、215、216、217、218、 219、220、221、222、223、224、225,226、227、228、229、230、231、232、233、234、235、236、237、 238、239、240、241、242、243、244、245、246、247、248、249、250、251、252、253、254、256、257、 258、259、260、261、262、263、264、265、266、267、268、269、270、271、272、273、274、275、276、 277、278、279、280、281、282、283、284、285、286、287、288、289、290、291、292、293、294、295、 296、297、298、299、300、301、302、303、304、305、306、307、308、309、310、311、312、313、314、 315、316、317、318、319、320、321、322、323、324、325、326、327、328、329、330、331、332、333、 334、335、336、337、338、339、340、341、342、343、344、345、346、347、348、349、350、351、352、 353、354、355、35、357、358、359、360、361、362、363、364、365、366、367、368、369、370、371、 408、409、410、411、412、413、414、415、416、417、418、419、420、421、422、423、424、425、426、 427、428、429、430、431、434、435、436、437、438、439、440、441、442、443、444、445、446、447、 448、449、450、451、452、453、454、455、456、457、458、459、460、461、462、463、464、465、466、 467、468、469、470、471、472、473、474、475、476、477、478、479、480、481、482、483、484、485、 486、487、488、489、490、491、492、493、494、495、496、497、498、499、500、501、502、503、504、 505、506、507、508、509、510、511、512、513、514、515、516、517、518、519、520、521、522、523、 524、525、526、527、528、529、530、531、532、533、534、535、536、537、538、539、540、541、542、 543、544、545、546、547、548、549、550、551、552、553、554、555、556、557、558、559、560、561、 562、563、564、565、566、567、568、569、570、571、572、573、574、575、576、577、578、579、580、 581、582、583、584、585、586、587、588、589、590、591、592、593、594、595、596、597、598、599、 600、601、602、603、604、605、606、607、608、609、610、611、612、613、614、615、616、617、618、 619、620、621、622、623、624、625、626、627、628、629、630、631、632、633、634、635、636、637、 638、639、640、641、642、643、644、645、646、647、648、649、650、651、652、653、654、655、656、 657、658、659、660、661、662、663、664、665、666、667、668、669、670、671、672、673、674、675、 676、677、678、679、680、681、682、683、684、685、686、687、688、689、690、691、692、693、694、 695、696、697、698、699、700、701、702、703、704、705、706、707、708、709、710、711、712、713、 714、715、716、717、718、719、720、721、722、723、724、725、726、727、728、729、730、731、732、 733rd, 734,735 or 736 parent toxin-II variations.Such second polypeptide can be well known targeting sequencing or secretion signal sequence Row, or the composition sequence that composition sequence is for example obtained from cloning process, or label such as hexahistine label (SEQ ID NO： 108).Such second polypeptide can be half-life extension moiety.In one embodiment, separated fusion protein includes conjugated To the parent toxin-II variations of the invention of half-life extension moiety.
Workable exemplary half-life prolongation includes well known human serum albumins, transthyretin (TTR), thyroxine-binding globulin (TGB), albumin combination domain or Fc or its fragment.It is biologically suitable to can also be used Polymer or copolymer, such as ethylene glycol or polyethylene glycol (PEG) molecule, such as PEG5000 or PEG20000, glucan, gather Lysine；The aliphatic acid and fatty acid ester of different chain length, for example, laurate, myristinate, stearate, Arachidate, Behenate, oleate, arachidonate, suberic acid, tetracosandioic acid, octadecane diacid, docosandioic acid etc.；Octane Or carbohydrate (glucan, cellulose, oligosaccharides or polysaccharide).The sample portion of bio distribution can be improved including Polyaminated (putrescine, spermine or spermidine etc.), halogenation (chlorine, Australia, fluorine, iodine) and glycosylation.These parts can be with parent toxin-II variant polypeptides Directly merge and the clone of standard and expression technology generation can be passed through.Alternatively, well known chemical conjugation methods can be used for inciting somebody to action These are partially attached to the parent toxin-II variations being prepared by recombinant of the present invention.Alternatively, can partly make during Solid phase peptide synthesis Added for undoded amino acid.
In another embodiment disclosed in this invention, it is included in the numbered embodiment of following band, this hair The half-life extension moiety of bright fusion protein is human serum albumins, the variation of human serum albumins, albumin combination domain (ABD) or polyethylene glycol (PEG).
In another embodiment disclosed herein, it is included in the numbered embodiment of following band, half-life period Prolongation is conjugated to parent toxin-II variations by connector.Suitable connector is well-known, and including having SEQ ID NO：The connector of sequence shown in 80 or 81.
The exemplary fusion proteins of parent toxin-II variations comprising the present invention are with SEQ ID NO：83、85、87、89、 91st, those fusion proteins of 93,95,97,99,101 or 103 polypeptide sequence.
Parent toxin-II the variations disclosed in this invention of introducing other part can be compared by a variety of well known determination methods The degree of functionality of (being included in the variation in the numbered embodiment of following band).For example, it is coupled to the parent toxin-II variations of PEG Pharmacokinetic properties can be assessed in well known In vivo model.
Other parent toxin-II variations and parent toxin-II variant fusion proteins are within the scope of the invention.With parent's peptide phase Than that as long as the variation of gained or fusion protein keep similar characteristic, can be carried out in addition to the parent toxin-II variations of the present invention Displacement.It is exemplary to be modified to the conservative substitution that for example cause parent toxin-II variations that there is the characteristic similar with parent molecules. Conservative substitution is those occurred in its side chain in relevant amino acid residues.The amino acid of gene code can be divided into four Class：(1) it is acid (aspartic acid, glutamic acid)；(2) it is alkaline (lysine, arginine, histidine)；(3) nonpolar (alanine, figured silk fabrics Propylhomoserin, leucine, isoleucine, proline, phenylalanine, methionine, tryptophan)；And (4) non-charged polarity (sweet ammonia Acid, asparagine, glutamine, cysteine, serine, threonine, tyrosine).Phenylalanine, tryptophan and tyrosine have When by common category be aromatic amino acid.Alternatively, amino acid repertoire can be grouped into：(1) acid (asparagus fern ammonia Acid, glutamic acid)；(2) alkaline (lysine, arginine, histidine), (3) aliphatic series (glycine, alanine, valine, leucine, Isoleucine, serine, threonine), wherein serine and threonine are optionally grouped into hydroxyl aliphatic series respectively；(4) it is fragrant Race's (phenylalanine, tyrosine, tryptophan)；(5) acid amides (asparagine, glutamine)；(6) sulfur-bearing (cysteine and Methionine) (Stryer (eds.), Biochemistry, second edition, WH Freeman and Co., 1981).Can to parent toxin- II variations carry out non-conservative displacement, which is related to the radical amino acid replacement between different classes of amino acid, to change The property of kind parent toxin-II variations and parent toxin-II variant fusion proteins.Determination method described herein can be used, by commenting Estimate the polypeptide of modification or fragment produces the ability of response in a manner of similar to unmodified polypeptide or fragment, be easily determined Whether the change in polypeptide or the amino acid sequence of its fragment causes functional homologue.Wherein there occurs more than one replacement Peptide, polypeptide or protein can be tested easily in the same manner.
Another embodiment of the invention is corresponding to SEQ ID NO：Wrapped at the position of 1 position W7 and/or W30 3 spider venom cysteine knot peptide of separated family containing at least one displacement.3 spider toxin of family includes 14 kinds with conservative The toxin of C- stub areas, including (in addition to parent toxin-II) κ-TRTX-Gr2b, κ-TRTX-Gr2c, κ-TRTX-Ps1a, κ- TRTX-Ps1b、β-TRTX-Gr1b、κ-TRTX-Cj2a、κ-TRTX-Cj2b、κ-TRTX-Ec2c、β-TRTX-Gr1a、κ-TRTX- Those shown in Ec2b, κ-TRTX-Ec2a and β/κ-TRTX-Cj2a and Figure 14.Displacement at position W7 and/or W30 is pre- Phase can improve the folding of 3 spider venom cysteine knot polypeptide of family.
Another embodiment (being included in the numbered embodiment of following band) disclosed in this invention is separated Synthetic polyribonucleotides, it includes the polynucleotides of the coding parent toxin-II variations of the present invention.
Disclosed herein is some exemplary synthetic polyribonucleotides, however, it is close that heredity is given in given expression system Code degeneracy or codon preference, encode the present invention parent toxin-II variations and parent toxin-II variant fusion proteins it is other Synthetic polyribonucleotides is also within the scope of the invention.Exemplary synthetic polyribonucleotides is such as SEQ ID NO：84、86、88、 90th, the polynucleotide sequence shown in 92,94,96,98,100,102 and 104, the original poison of the polynucleotide sequence coding present invention Element-II variant fusion proteins.Those skilled in the art being capable of the easily fusion egg of identification code parent toxin-II variations in itself Polynucleotide passage in white.The synthetic polyribonucleotides sequence of the parent toxin-II variations or fusion protein that encode the present invention can have Effect is connected to one or more controlling elements, such as allows nucleotides sequence to be listed in the promoter expressed in expected host cell and increasing Hadron.The synthetic polyribonucleotides can be cDNA.
The polynucleotides of the present invention can be produced by chemical synthesis, such as be carried out on automation polynucleotides synthesizer Solid phase polynucleotide synthesis.Alternatively, polynucleotides of the invention can be produced by other technologies, such as based on PCR Duplication, the duplication based on carrier or the DNA operating technologies based on restriction enzyme.Being used to prepare or obtaining has known array The technologies of polynucleotides be known.
The polynucleotides of the present invention can also include at least one non-coding sequence, the sequence such as transcribed but do not translated, Termination signal, ribosome bind site, mRNA critical sequences, introne and polyadenylation signal.Polynucleotide sequence may be used also To include the other sequence for encoding other amino acid.These other polynucleotide sequences can (such as) coded markings or Well known sequence label, such as hexahistine (SEQ ID NO：108) or HA labels, these labels are conducive to fused polypeptide Purifying.
Another embodiment (being included in the numbered embodiment of following band) disclosed in this invention is comprising this The carrier of the polynucleotides of invention.Examples of such carriers can be plasmid vector, viral vector, the carrier for baculovirus expression, Carrier based on transposons or it is any other be suitable for introducing the polynucleotides of the present invention by any means give organism or The carrier of genetic background.For example, parent toxin-II the variations of the coding present invention or more nucleosides of parent toxin-II variant fusion proteins Acid is inserted into expression vector, and is operably coupled to the control sequence in expression vector to ensure effective expression, such as Signal sequence, promoter (for example, naturally associated or heterologous promoter), enhancer element and transcription terminator, and The polynucleotides are selected as and the parent toxin-II variations of the selected expression present invention or parent toxin-II variant fusion proteins Host cell is compatible.Once carrier is incorporated into appropriate host, which is maintained at suitable for high level expression by being mixed Polynucleotide encoding protein under conditions of.
Suitable expression vector be usually implemented as episome or as host chromosome DNA part in host organism Middle duplication.In general, expression vector includes selected marker, such as ampicillin resistance marker, Hygromycin resistance marker, tetracycline Resistance marker, kalamycin resistance mark or neomycin resistance marker, with allow detection transfected required DNA sequence dna those are thin Born of the same parents.
Suitable promoter and enhancer element are well known in the art.For the feelings expressed in bacterial cell Condition, suitable promoter include but not limited to lacl, lacZ, T3, T7, gpt, λ P and trc.For what is expressed in eukaryotic Situation, suitable promoter include but not limited to light chain and/or heavy chain immunoglobulin gene promoter and enhancer element, thin Born of the same parents' hugeization virus immediate early promoter, herpes simplex virus thymidine kinase promoter, early and late SV40 promoters, reverse Record promoter present in the long terminal repeats of virus, Mouse Metallothionein-I promoters and known in the art Various tissue-specific promoters.For the in the case of of being expressed in yeast cells, suitable promoter is that constitutive promoter is all Such as ADH1 PGK1, ENO or PYK1 promoters, or adjustable promoter such as GAL1 or GAL10 promoters.Choosing Appropriate carrier and promoter are selected in the horizontal extent of those of ordinary skill in the art.
Many suitable carriers and promoter are known to the skilled in the art；Many of which it is commercially available with It is used to prepare recombinant precursor.Following carrier provides by way of example.Bacterium：pBs、phagescript、PsiX174、 PBluescript SK, pBs KS, pNH8a, pNH16a, pNH18a, pNH46a (Stratagene, La Jolla, Calif., USA)；PTrc99A, pKK223-3, pKK233-3, pDR540 and pRIT5 (Pharmacia, Uppsala, Sweden).Eucaryon is given birth to Thing：PWLneo, pSV2cat, pOG44, PXR1, pSG (Stratagene), pSVK3, pBPV, pMSG and pSVL (Pharmacia)。
Exemplary carrier for expressing parent toxin-II variations or parent toxin-II variant fusion proteins is with the following group Into the carrier of part：Amicillin resistance selected marker, CMV promoter, CMV intrones, signal peptide, neomycin resistance, f1 Parent toxin-II the variations or parent toxin-II variant fusion proteins of replication orgin, SV40 polyadenylation signals and the coding present invention CDNA.
Another embodiment (being included in the numbered embodiment of following band) disclosed in this invention is comprising this The host cell of the carrier of invention.Term " host cell " refers to the cell for having been introduced into carrier.It should be understood that term host cell It is not only intended to refer to specific host cell, also refers to the filial generation of this cell.Because due to mutation or since environment influences, rear Some modifications occur for Dai Zhongke, therefore this filial generation can be different from mother cell, but are included in term " host used herein In the range of cell ".Such host cell can be eukaryotic, prokaryotic, plant cell or ancient bacterium cell.
The example of prokaryotic host cell is that Escherichia coli (Escherichia coli), Bacillus (bacilli) are such as withered Careless bacillus (Bacillus subtilis) and other enterobacteriaceaes (enterobacteriaceae) such as salmonella (Salmonella), Serratieae (Serratia) and various pseudomonas (Pseudomonas) species.Other microorganisms Such as yeast can also be used for expressing.The example of suitable yeast host cell is saccharomyces (Saccharomyces) (for example, making Brewer yeast (S.cerevisiae)) and pichia (Pichia).Exemplary eukaryotic cell can be mammal, insect, Birds or other animal origins.Mammal eukaryotic includes immortalized cell system, and such as hybridoma or myeloma are thin Born of the same parents are that (Europe is thin by such as SP2/0 (American type culture collection (ATCC), Manassas, VA, CRL-1581), NS0 Born of the same parents' culture collection (ECACC), Salisbury, Wiltshire, UK, ECACC No.85110503), FO (ATCC ) and Ag653 (ATCC CRL-1580) mouse cell line CRL-1646.A kind of exemplary human myeloma cell line is U266 (ATTC CRL-TIB-196).Other available cell lines include those cell lines derived from Chinese hamster ovary (CHO) cell, such as CHO-K1SV (Lonza Biologics, Walkersville, MD), CHO-K1 (ATCC CRL-61) or DG44.
Introducing of the polynucleotides (such as carrier) into host cell can be real by method well known to those skilled in the art It is existing.Illustrative methods are calcium phosphate transfection, the transfection of DEAE- glucans mediation, microinjection, the transfection of cation lipid mediation And electroporation.
Another embodiment of the invention (being included in the numbered embodiment of following band) is to be used to prepare this hair The method of bright parent toxin-II variations, this method comprise the following steps：The host cell of the present invention is provided；And it is being enough table The host cell is cultivated under conditions of up at least one parent toxin-II variations of the invention.
Host cell can be suitable for keeping or the host cell of the given type of propagation and be enough to express polypeptide any Under the conditions of cultivate.The condition of culture, culture medium and correlation technique for being enough to express polypeptide are well known in the art.For example, many food in one's mouths Newborn class cell type can carry out aerobic culture at 37 DEG C with the DMEM culture mediums suitably buffered, and bacterium, yeast and other Cell type can be cultivated under 37 DEG C and appropriate atmospheric conditions in LB culture mediums.
In the method disclosed in the present, it is included in the numbered embodiment of following band, parent toxin-II variations Various well known methods can be used to confirm for expression.For example, it can be confirmed using such as SDS-PAGE or HPLC using detection reagent The expression of polypeptide.
Another aspect of the present invention is the method for adjusting Nav1.7 activity in biological tissue, and this method includes：Make expression The biological tissue of Nav1.7 contacts with the parent toxin-II variations of the invention of Nav1.7 regulated quantitys.
Treatment method
Parent toxin-II variations (being included in the variation in the numbered embodiment of following band) disclosed in this invention are available In desired any treatment, in these treatments, variation treatment, mitigation or lenitive symptom or and sensory nerve it is expected Member or the relevant Other diseases of sympathetic neuron dysfunction.
Using parent toxin-II variations disclosed in this invention (being included in the variation in the numbered embodiment of following band) The pain for the treatment of can be any kind of pain, such as chronic ache, Acute Pain, neuropathic pain, nociceptive pain, interior Dirty pain, back pain, with the relevant pain of inflammatory conditions, postoperative pain, hot pain or with disease and the relevant pain of regression Bitterly.
Using parent toxin-II variations disclosed in this invention (being included in the variation in the numbered embodiment of following band) Can be the pain of Nav1.7- mediations.
As used herein, the pain of Nav1.7 mediations refers at least partially due to Nav1.7 channel activities increase and cause Pain.
The method of the present invention can be used for treating the animal patient for belonging to any classification.The example of such animal is moved including lactation Thing, such as people, rodent, canine, cat class and farming animals.
Pain and/or the pain of Nav1.7 mediations may be caused due to one or more reasons, such as peripheral neuropathy, Central neuropathy, neurothlipsis or nerve compression syndromes such as carpal tunnel syndrome, tarsal tunnel syndrome, ulnar nerve card are fallen into, pressure Compel nerve root disease, lumbar spinal stenosis, sciatic nerve crush, spinal roots compressing, intercostal neuralgia, compressive radiculopathy With root back pain, spinal roots lesion, neuritis, autoimmune disease, systemic inflammatory, chronic inflammatory diseases, joint Inflammation, rheumatic disease, lupus, osteoarthritis, general gastrointestinal disease, colitis, gastric ulcer, duodenal ulcer, inflammatory bowel Disease, irritable bowel syndrome, with the relevant pain of diarrhea, Inflammatory eye conditions, inflammatory or unstable bladder is sick, psoriasis, tool There is the skin disorder of inflammatory components, tan severely, carditis, dermatitis, myositis, neuritis, collagen vascular diseases, inflammatory pain and correlation Property hyperalgia and allodynia, neuropathic pain and relevant hyperalgia and allodynia, multiple sclerosis, takes off Pain caused by myelin disease, diabetes, diabetic neuropathic pain, cusalgia, amputation or abscess, phantom limb pain, fracture pain Bitterly, bone injury, direct wound, HIV infection, acquired immunodeficiency syndrome (" AIDS "), smallpox infections, herpes infection, cruelly Toxin or other foreign particles or molecule are exposed to, invasive cancer, cancer, chemotherapy, radiotherapy, hormone therapy, burns, congenital to lack Fall into, toothache, pain caused by gout, fibromyalgia, encephalitis, chronic alcoholism, hypothyroidism, uremia and Wei Sheng Element lacks, trigeminal neuralgia, apoplexy, thalamic pain syndrome, and general headache, antimigraine, cluster headache, tension headache, is mixed Blood vessel and non-vascular syndrome are closed, sympathetic nerve keeps pain, deafferentation syndromes, asthma, epithelial tissue damage Or dysfunction, respiratory tract, urogenital tract, the Visceromotor of intestines and stomach or angiosomes are disorderly, wound, burn, anaphylaxis Pain during dermoreaction, pruritus, angiokinesis or allergic rhinitis, or bronchial disease, dysmenorrhoea, work and childbirth, Indigestion, gastroesophageal reflux, pancreatitis and splanchnodynia.
It can be alleviated by the parent toxin-II variations of the present invention relevant with sensory neuron or sympathetic neuron dysfunction Other diseases include itch, cough and asthma.The complete missing of the SCN9A genes of mouse causes the itch that mouse induces histamine Complete insensitive (Gingras et al., American Pain Society Meeting Abstract 2013 and United States Patent (USP) Announce 2012/0185956).The discovery shows, Nav1.7 peptides retarding agent can be used for treatment can the itch as caused by various sources, Such as skin disease or inflammatory conditions；Or such as kidney or disease in the liver and gallbladder, immunological diseases, the inflammation of drug response and unknown/primary illness Venereal disease disease, including dermatitis, psoriasis, eczema or insect sting and sting.Nav1.7 is also expressed in the sensory nerve for dominating air flue (Muroi et al., J Physiol.2011 December 1,589 (Pt 23)：5663-76；Muroi et al., Am J Physiol Regul Integr Comp Physiol.2013 April 10), this shows that Nav1.7 peptides retarding agent can be conducive to treatment cough The inflammatory conditions such as asthma of cough and air flue as caused by acute or chronic cough or the stimulation of stomach oesophagus reflux disease Immune response relevant with allergy, bronchial spasm, Chronic Obstructive Pulmonary Disease, chronic bronchitis, wind-puff and hiccup (are beaten Belch, hiccup).The Nav1.7 silences in ganglion nodosum is almost eliminated mechanical detection using shRNA in cavy body causes Cough adverse current (Muroi et al., Am J Physiol Regul Integr Comp Physiol, on April 10th, 2013).
One aspect of the present invention is the alleviation or itch for treating subject, the method for cough or asthma, and this method is led to Cross to subject in need thereof and apply the parent toxin-II variations disclosed in this invention of therapeutically effective amount (under being included in Arrange with the variation in numbered embodiment) persistently it is enough to alleviate time of itch, cough or asthma to carry out.
Another aspect of the present invention is alleviation or treats the itch of the Nav1.7 mediations of subject, Nav1.7 mediations The method of the asthma of cough or Nav1.7 mediations, this method to subject in need thereof by applying therapeutically effective amount Parent toxin-II variations (being included in the variation in the numbered embodiment of following band) disclosed in this invention are persistently enough to alleviate The time of itch, cough or asthma carries out.
As used herein, the itch of Nav1.7 mediations refers at least partially due to Nav1.7 channel activities increase and cause Itch.
As used herein, the cough of Nav1.7 mediations refers at least partially due to Nav1.7 channel activities increase and cause Cough.
As used herein, the asthma of Nav1.7 mediations refers at least partially due to Nav1.7 channel activities increase and cause Asthma.
It can be used and following band (it is numbered to be included in test parent toxin-II variations disclosed in this invention with drag Variation in embodiment) mitigate or relieve pain and/or Nav1.7 mediation pain in terms of effect：It is as described herein dynamic Thing model, and such as quick model of abnormal pain of the model of Rat Spinal Nerve Tissue ligation (SNL) neuropathic pain, carrageenan induction, The mould of the quick model of abnormal pain, thermal burn model, formalin model and Bennett models that Freund Freund's complete adjuvants (CFA) induce Type, and U.S. Patent application 2011/0124711 and United States Patent (USP) 7, the model described in 998,980.Carrageenan induction Abnormal pain is quick and the abnormal pain of CFA inductions it is quick be inflammatory pain model.Bennett models provide the animal mould of chronic ache Type, including postoperative pain, Complex regional pain syndrome and reflex sympathetic dystrophy.
Any model in above-mentioned animal model is used equally for the parent toxin-II variant inhibitors of the assessment present invention treating The effect of in terms of pain and/or the pain of Nav1.7 mediations.By the present invention parent toxin-II variations the effect of with non-treatment group or Blank control group is compared.In addition or alternatively, can relatively come compared with pain relief medication known to one or more Assess effect.
The present invention is provided (is included in the numbered embodiment party of following band using parent toxin-II variations disclosed in this invention Variation in case) treatment Nav1.7 mediation pain method.In the unexamined patent application (U.S. Patent Application No. of the present inventor 61/781,276) it has been found that being for the pain for treating and/or alleviating various animal models of pain using Nav1.7 blocking peptides in Effectively, this is disclosed in document and the content that proposes is opposite.Although have proven to Nav1.7 inhibitor peptides be overexpressed The vitro cell culture model of Nav1.7, or (wherein blood-nerve barrier passes through de- sheath or hypertonic saline in separated neuron Injection come across) in Nav1.7 effectively and/or with selectivity, but at present not yet prove Nav1.7 inhibitor peptides in animal body In interior pain model effectively, it was reported that peptide cannot cause the shortage of effect across blood-nerve barrier in the model.Multiple publications Describe Nav1.7 blocking peptides and lack effect in animal models of pain or separated nerve.Such as in Hackel et al., Proc Natl Acad Sci 109：E2018-27, describes in 2012 unless the barrier disability of nerve week, otherwise ProTx-II is being separated Nerve in cannot suppress the generation of action potential, nerve week barrier diffusion barrier is provided in the model.It has been found that ProTx- II is invalid in the acute and rodent model of inflammatory pain；This reasonably explains ProTx-II cannot be across blood-nerve Phenomenon (Schmalhofer et al., the Mol Pharmacol 74 of barrier：1476-1484,2008).It has been found that Nav1.7 peptides are malicious The oral bioavailability rate of plain retarding agent is low, and they are difficult to be delivered to nerve endings, this illustrates them as therapeutic agent Purposes is still limited (Dib-Hajj et al., Nature Rev Neuroscience 14,49-62,2013).
Nav1.7 is expressed in peripheral nervous system, such as is expressed in nociception dorsal root ganglion (DRG), most bright It is expressed in nociception minor diameter DRG neurons, is especially expressed in the surrounding end in skin aobviously, but seldom table Up in brain.The distribution (such as sensory ending) of Nav1.7 and physiological function make it tend in the transmission of pain stimulation send out Wave main function.
One embodiment of the invention for treatment Nav1.7 mediation pain method, this method by have to it need Parent toxin-II the variations disclosed in this invention that the subject wanted applies therapeutically effective amount (it is numbered to be included in following band Variation in embodiment) time of pain for being persistently enough to treat Nav1.7 mediations carries out.
Parent toxin-II variations (being included in the variation in the numbered embodiment of following band) disclosed in this invention are available In desired any treatment, in these treatments, it is expected variation treatment Nav1.7 mediations pain or with sensory neuron or The relevant Other diseases of sympathetic neuron dysfunction." treatment " of pain refers to include partially or completely to prevent, prevents, presses down Make, mitigate or delay the sensation of pain.
In some embodiments, the pain of Nav1.7 mediations is chronic ache, and Acute Pain, neuropathic pain, is injured Property pain, visceral pain, back pain, postoperative pain, hot pain, phantom limb pain, or with following relevant pain：Inflammatory disease Disease, Primary Erythermalgia (PE), paroxysmal severe pain disease (PEPD), osteoarthritis, rheumatoid arthritis, lumbar intervertebral disc cutting Except neuropathy (PHN), trigeminal neuralgia after art, pancreatitis, fibromyalgia, painful diabetic neuropathy change (PDN), bleb (TN), spinal cord injury or multiple sclerosis bitterly, or with disease and the relevant pain of regression.
Neuropathic pain includes such as painful diabetic neuropathy and becomes neuropathy (PHN) or three after (PDN), bleb Pitch neuralgia (TN).Other reasons of neuropathic pain are ached after including spinal cord injury, multiple sclerosis, phantom limb pain, apoplexy Pain and the relevant pain of HIV.Illness such as Chronic back pain, osteoarthritis and cancer may also lead to produce the relevant pain of nerve Bitterly, it is thus possible to be adapted in use to the parent toxin-II variations of the present invention to be treated.
In another embodiment, the pain and Primary Erythermalgia (PE), paroxysmal severe pain of Nav1.7 mediations Disease (PEPD), osteoarthritis, rheumatoid arthritis, microendoscopic lumbar discectomy, pancreatitis or fibromyalgia are related.
In the method for the invention, parent toxin-II variations of the invention can be conjugated to the second polypeptide to form fusion protein. Fc fusions as the well-known exemplified by such fusion protein, or human serum albumins is fused to extend melting for inhibitor peptides half-life period It is fit.It is conjugated to be directly conjugated by the connector such as connector rich in glycine-serine.Such connector is that this area institute is ripe Know.Can be during well known method and the treatment of those described herein method or mitigation pain be used to including other portion The Nav1.7 retarded capabilities and effect of the parent toxin-II variations of the invention divided are compared.
The sensory neuron of parent toxin-II variations treatment or other diseases of sympathetic neuron dysfunction of the present invention can be used Disease includes asthma, cough, heartburn, itch, dermatitis, unstable bladder and Raynaud's disease.
Pharmaceutical composition
Parent toxin-II the variations (being included in the variation in the numbered embodiment of following band) of the present invention can be pharmaceutically Prepared in acceptable medium or carrier.One embodiment of the invention is pharmaceutical composition, and it includes point of the present invention From parent toxin-II variations and pharmaceutically acceptable excipient.
Suitable medium or carrier can be water for injection, normal saline solution or artificial cerebrospinal fluid, may be supplemented with The common other materials in the composition of parenterai administration.Other exemplary media thing is neutral buffered saline or is mixed with Sero-abluminous brine.These solution are sterile, and substantially free of particulate matter, and can killing by conventional well known Bacterium technology (for example, filtering) is sterilized.Composition can be included close to the pharmaceutically acceptable excipient needed for physiological condition, PH adjusting agent and buffer, stabilizer, thickener, lubricant and coloring agent etc..Suitable medium and its preparation and envelope Mounted in such as Remington：The Science and Practice of Pharmacy (the 21st edition, Troy, D. are compiled, Lippincott Williams＆Wilkins, Baltimore, MD (2005) the 40th and 41 chapters) in be described.
In the method for the invention, parent toxin-II variations of the invention can periphery administration." periphery administration " or " apply periphery " refer to the outside that introduces the reagents into subject's central nervous system.Periphery, which applies to cover to remove, is applied directly to ridge or big Any route of administration outside brain.
Periphery administration can be locally or systemically.Local application can be used for therapeutic agent being concentrated into action site, such as office Portion is applied to joint, surgical wound, damage/wound site, peripheral nerve fiber, various organs (GI, apparatus urogenitalis official rank) Or Inflamed tissue.According to the property of composition, systemic administration makes pharmaceutical composition substantially be delivered to the whole outer of subject All nervous systems, can also be delivered to central nervous system.
Periphery route of administration covers but is not limited to local application, intravenous injection, hypodermic injection, intramuscular injection, joint injection Or other injections, and implantable miniature pump or other delayed release devices or preparation.
Compound can also be administered directly central nervous system, such as intrathecal injection or intracerebral administration.Can be by making Lasting intrathecal drug delivery is realized with the spinal cord drug efflux pump of implantation.
The pharmaceutical composition of the present invention includes being related to the sustained release of parent toxin-II variations or the system of controlled release preparation of the present invention Agent.These preparations can be obtained by using following device：Such as Injectable microspheres body, can bio-digestion particle, microemulsion, receive Rice corpuscles, milimicron vesicle, thick emulsion, polymerizable compound (such as polyester, polyaminoacid, hydrogel, poly- (lactic acid), polyglycolic acid or Vinyl acetic acid ethyl copolymer), microballon or liposome, hyaluronic acid or implantable drug delivery device.
Parent toxin-II variations (being included in the variation in the numbered embodiment of following band) disclosed in this invention can make It is ready for use on non-bowel (subcutaneous, intramuscular or intravenous), intracerebral (in brain parenchym), intrathecal, articular cavity is interior, the ventricles of the brain are interior, intramuscular, eye In interior, intra-arterial, portal vein or intralesional routes；By slow-released system or by implanted device or any other form of medication, Particularly in the form of liquid solution or suspension；For cheek or sublingual administration, such as in the form of a tablet or capsule；It is or intranasal Administration, such as in the form of powder, nasal drop or aerosol or some medicaments；Percutaneous dosing, with gel, ointment, lotion, creme Or the form of dedusting powder, the suspension with chemical intensifier or patch delivery system, it is saturating to modify skin texture or increase Drug concentration in skin patch, or it is (international using the medicament that can be applied the preparation comprising protein and peptide on the skin Patent disclosure WO98/53847), or for producing the application of instantaneous transhipment passage such as electroporation with electric field, or for increasing band The electric percutaneous mobility of medicine such as iontophoresis, or (U.S. is special for the application of ultrasonic such as Transdermal absorption ultrasonic wave Profit 4,309,989 and 4,767,402).Composition also can be by being implanted into absorption or being encapsulated with the film of required molecule, sponge or other Suitable material and local application.
In certain embodiments, when using implanted device, which can be implanted into any suitable tissue or organ, And required molecule can be delivered by diffusion, time release pill or continuous administration.
According to selected specific mode of administration, the parent toxin-II variations or other of the invention in such pharmaceutical preparation The concentration of Nav1.7 inhibitor peptides can widely change, e.g., from about 0.1 weight %, 0.2 weight %, 0.3 weight %, 0.4 weight Measure %, 0.5 weight %, 0.6 weight %, 0.7 weight %, 0.8 weight %, 0.9 weight %, 1.0 weight %, 1.1 weight %, 1.2 weight %, 1.3 weight %, 1.4 weight %, 1.5 weight %, 1.6 weight %, 1.7 weight %, 1.8 weight %, 1.9 weights %, 2 weight % are measured, or 15 weight %, 20 weight %, 30 weight %, 40 weights are up to between 5 weight % in 2 weight % %, 50 weight %, 60 weight % or 70 weight % are measured, and is based primarily upon fluid volume, viscosity and other factors and makes choice. Parent toxin-II the variations of the present invention can be freezed for storing, and be restored before use in suitable medium.Have proven to this Technology is effective to conventional protein prepared product.Lyophilized and recovery technique is known in the art.
The illustrative drug composition of the present invention can include the Tris buffer solutions that pH is about 7.0-8.5, or pH is about The acetate buffer of pH4.0-5.5, and may also include D-sorbite, sucrose, Tween-20 and/or its suitable substitute.
Those skilled in the art can be readily determined appropriate treatment effective dose.Effective dose refers to be enough to produce As a result, partially or completely preventing, preventing, suppress, mitigate or delaying and any relevant pain of pain medicine illness needed for raw The amount or dosage of sensation.Effective dose can change according to specific medium thing and selected parent toxin-II variations of the invention, And also depend on many factors and the seriousness of illness relevant with subject to be treated and pain.For example, such as The factors such as age, weight and the health status of subject of pharmaceutical composition of the invention to be administered, and preclinical animal The dose response curve and toxicity data that work obtains can be in limits of consideration.If necessary, definite dosage can treated Period is repeated at desired intervals, which (e.g., protected by doctor or the others skilled in the art of association area Scholar, animal doctor or veterinary technician) suitably select.Give the technology of the effective dose of reagent or the measure of therapeutically effective amount in this area Within the limit of power of personnel.
Therefore, the pharmaceutical composition of the invention for intramuscular injection can be prepared as containing 1ml sterile buffered waters, Yi Jiyue Parent toxin-II the variations of the invention of 1ng to about 100mg, about 50ng to about 30mg or about 5mg to about 25mg.Similarly, use It may be made in the pharmaceutical composition of the invention of intravenous infusion containing the sterile Ringer's solutions of about 250ml, and about 1mg is extremely Parent toxin-II the variations of the invention of about 30mg or about 5mg to about 25mg.It is used to prepare the reality of the composition of parenteral administration Border method is well known, and be described in greater detail in for example " Remington ' s Pharmaceutical Science ", 15 editions, in Mack Publishing Company, Easton, PA.
Other embodiments of the present invention
Some other embodiments of the present invention are set forth below with respect to the disclosure in this paper other places.It is set forth above be with The feature of the relevant embodiment of the present invention of invention disclosed herein further relates to these other numbered embodiments of band Each of.
1) a kind of separated parent toxin-II variations, the separated parent toxin-II variations include sequence
X1X2X3CX4X5WX6QX7CX8X9X10X11X12CCX13X14FX15CX16LWCX17KKLW(SEQ ID NO：403), wherein
X1For G, P, A or missing；
X2For P, A or missing；
X3For S, Q, A, R or Y；
X4For Q, R, K, A or S；
X5For K, S, Q or R；
X6For M or F；
X7For T, S, R, K or Q；
X8For D or T；
X9For S, A or R；
X10For E, R, N, K, T or Q；
X11For R or K；
X12For K, Q, S or A；
X13For E, Q or D；
X14For G or Q；
X15For V or S；
X16For R or T；And
X17For K or R；
Separated parent toxin-II the variations optionally have the extension of N- ends or the extension of C- ends,
Wherein polypeptide suppresses the activity of people Nav1.7, its IC50Value is about 1 × 10-7M or smaller, wherein IC50Value is steady Surely there are 25 × 10 in the HEK293 cells of expression people Nav1.7-6Fluorescence resonance is used in the case of M3- veratroyl protocevines Energy transfer (FRET) usesTetra membrane depolarizations determination method and measure.
2) extension of parent toxin-II variations according to claim 1, wherein N- ends includes SEQ ID NO：372、 373rd, 374,375,376,377,378,379,380,381,382,383,384 or 385 amino acid sequence.
3) parent toxin-II variations according to claim 1 or 2, wherein C- ends extension includes SEQ ID NO：374th, 386,387,388,389,390,391,392,393,394,395,396 or 397 amino acid sequence.
4) parent toxin-II variations according to Claims 2 or 3, wherein N- ends extension and/or C- ends End extends through connector and is conjugated to the parent toxin-II variations.
5) parent toxin-II variations according to claim 4, its center tap include SEQ ID NO：383、392、398、 399th, 400,401 or 402 amino acid sequence.
6) the separated parent toxin-II variations according to any one of claim 1-5, the separated parent toxin-II Variation includes SEQ ID NO：30、40、44、52、56、56、59、65、78、109、110、111、114、117、118、119、120、 121、122、123、124、125、126、127、128、129、130、131、132、133、134、135、136、137、138、139、 140、141、142、143、144、145、146、147、148、149、150、151、152、153、154、155、156、157、158、 159、162、165、166、167、168、169、170、171、172、173、174、175、177、178、179、180、182、183、 184、185、186、189、190、193、195、197、199、206、207、208、209、210、211、212、213、214、215、 216、217、218、224、226、227、231、232、243、244、245、247、249、252、255、258、261、263、264、 265、266、269、270、271、272、273、274、275、276、277、278、279、280、281、282、283、284、285、 286、287、288、289、290、291、292、293、294、295、296、297、298、299、300、301、302、303、304、 305、306、307、308、309、310、311、312、313、314、315、316、317、318、319、320、321、322、323、 324th, 325,326,332,334,335,336,337,339,340,341,342,346,351,358,359,364,366,367 or 368 amino acid sequence.
7) the separated parent toxin-II variations according to any one of claim 1-6, the separated parent toxin-II Variation suppresses the activity of people Nav1.7, its IC50Value is about 3 × 10-8M or smaller.
8) separated parent toxin-II variations according to claim 7, the separated parent toxin-II variations suppress people The activity of Nav1.7, its IC50Value is between about 3 × 10-8M to about 1 × 10-9Between M.
9) the separated parent toxin-II variations according to claim 7 or 8, the separated parent toxin-II variations include Amino acid sequence GPQCX1X2WX3QX4CX5X6X7X8X9CCX10X11FX12CX13LWCX14KKLW(SEQ ID NO：404)；Wherein
X1For Q, R, K, A or S；
X2For K, S, Q or R；
X3For M or F；
X4For T, S, R, K or Q；
X5For D or T；
X6For S, A or R；
X7For E, R, N, K, T or Q；
X8For R or K；
X9For K, Q, S or A；
X10For E, Q or D；
X11For G or Q；
X12For V or S；
X13For R or T；And
X14For K or R.
10) separated parent toxin-II variations according to claim 9, the separated parent toxin-II variations include SEQ ID NO：56、78、111、114、117、118、119、122、123、129、130、131、132、133、134、135、136、 138、139、140、141、142、145、146、147、149、150、151、152、153、154、156、158、159、165、172、 173、175、177、178、183、184、185、186、189、190、193、197、199、207、210、211、216、217、224、 266th, 273,282 or 335 amino acid sequence.
11) the separated parent toxin-II variations according to any one of claim 1-10, wherein variation be optionally Suppress people Nav1.7.
12) separated parent toxin-II variations according to claim 11, the separated parent toxin-II variations include Sequence GPX1CQKWMQX2CDX3X4RKCCX5GFX6CX7LWCX8KKLW(SEQ ID NO：405)；Wherein
X1For Y, Q, A, S or R；
X2For T or S；
X3For S, R or A；
X4For E, T or N；
X5For E or Q；
X6For V or S；
X7For R or T；And
X8For K or R.
13) separated parent toxin-II variations according to claim 12, the separated parent toxin-II variations include SEQ ID NO：56、59、65、78、111、114、117、118、119、121、122、123、129、130、133、150、190、 217th, 281,324,325 or 326 amino acid sequence.
14) separated parent toxin-II variations according to claim 12, the separated parent toxin-II variations include Sequence GPQCQKWMQX1CDX2X3RKCCX4GFX5CX6LWCX8KKLW(SEQ ID NO：406)；Wherein
X1For T or S；
X2For S, R or A；
X3For E, T or N；
X4For E or Q；
X5For V or S；
X6For R or T；And
X7For K or R.
15) a kind of separated parent toxin-II variations, the separated parent toxin-II variations include and SEQ ID NO：78 Amino acid sequence (GPQCQKWMQTCDRERKCCEGFVCTLWCRKKLW-COOH) have 90%, 91%, 92%, 93%, 94%th, the amino acid sequence of 95%, 96%, 97%, 98% or 99% homogeneity, wherein
A) when residue numbering is according to SEQ ID NO：1 and timing, amino acid sequence has Q at position 1, at position 7 With Q, and there is F at position 19；
B) polypeptide suppresses the activity of people Nav1.7, its IC50Value is about 30 × 10-9M or smaller, wherein IC50Value is in stabilization There are 25 × 10 in the HEK293 cells of expression people Nav1.7-6Fluorescence resonance energy is used in the case of M 3- veratroyl protocevines Amount transfer (FRET) usesTetra membrane depolarizations determination method and measure；And
C) polypeptide optionally suppresses Nav1.7.
16) the separated parent toxin-II variations according to any one of claim 1-15, the separated parent toxin- II variations have free C- terminal carboxylics, acid amides, methyl nitrosourea or butyl amide group.
17) a kind of separated fusion protein, the separated fusion protein include the basis for being conjugated to half-life extension moiety Parent toxin-II variations any one of claim 1-16.
18) fusion protein according to claim 17, wherein half-life extension moiety are human serum albumins (HSA), albumin combination domain (ABD), Fc or polyethylene glycol (PEG).
19) a kind of separated polynucleotides, the original of the separated polynucleotide encoding according to claim 12 or 15 Toxin I I variant.
20) a kind of carrier, the carrier include separated polynucleotides according to claim 19.
21) a kind of host cell, the host cell include carrier according to claim 20.
22) method of the parent toxin-II variations of a kind of preparative separation, this method include culture according to claim 21 Host cell, and recycling by host cell produce parent toxin-II variations.
23) a kind of pharmaceutical composition, the pharmaceutical composition include the separation according to claim 1,6,12,13 or 15 Parent toxin-II variations and pharmaceutically acceptable excipient.
24) a kind of method of the pain for the Nav1.7 mediations for treating subject, this method are included in need thereof Subject applies a effective amount of parent toxin-II variations according to any one of claim 1-16 to treat the pain Bitterly.
25) according to the method for claim 24, wherein pain is chronic ache, Acute Pain, neuropathic pain, cancer Disease pain, nociceptive pain, visceral pain, back pain, postoperative pain, hot pain, phantom limb pain, or with it is following relevant Pain：Inflammatory conditions, Primary Erythermalgia (PE), paroxysmal severe pain disease (PEPD), osteoarthritis, rheumatoid joint Neuropathy after inflammation, microendoscopic lumbar discectomy, pancreatitis, fibromyalgia, painful diabetic neuropathy (PDN), bleb (PHN), trigeminal neuralgia (TN), spinal cord injury or multiple sclerosis.
26) according to the method for claim 24, wherein parent toxin-II variations are that periphery is applied.
27) according to the method for claim 24, wherein parent toxin-II variations are locally applied to joint, spinal cord, outer Section's wound, damage or wound site, peripheral nerve fiber, urogenital organ or Inflamed tissue.
28) according to the method for claim 24, wherein subject is people.
29) parent toxin-II variations according to any one of claim 1-16, the parent toxin-II variations are used to control Treat the pain of subject in need thereof.
30) parent toxin-II variations used according to claim 29, wherein pain are chronic ache, Acute Pain, Neuropathic pain, cancer pain, nociceptive pain, visceral pain, back pain, postoperative pain, hot pain, phantom limb pain, or Person and following relevant pain：Inflammatory conditions, Primary Erythermalgia (PE), paroxysmal severe pain disease (PEPD), osteoarthritis, Rheumatoid arthritis, microendoscopic lumbar discectomy, pancreatitis, fibromyalgia, painful diabetic neuropathy (PDN), bleb Neuropathy (PHN), trigeminal neuralgia (TN), spinal cord injury or multiple sclerosis afterwards.
31) parent toxin-II variations used according to claim 29 or 30, wherein parent toxin-II variations are peripheries Apply.
32) parent toxin-II variations used according to claim 29,30 or 31, wherein by parent toxin-II variations office Portion is applied to joint, spinal cord, surgical wound, damage or wound site, peripheral nerve fiber, urogenital organ or inflammation group Knit.
The present invention it is existing by combine in detail below, non-limiting example is described.
Embodiment 1：The design and preparation of parent toxin-II variations
Amino acid replacement that the single positions of parent toxin-II are limited scanning library be designed to assessment selectivity, peptide yield and The degree that homogenieity can improve.
What parent toxin-II variations were designed to following form can be by HSA fusion proteins that HRV3C protease is cut：From N- To C- ends：The cleavable peptides of 6 × His-HSA- connectors-HRV3C-(" 6 × His " is disclosed as SEQ ID to parent toxin-II variations NO：108)；Connector is (GGGGSGGGGSGGGGSGGGGS；SEQ ID NO：80, HSA sequence is SEQ ID NO：106, The sequence of the cleavable peptides of HRV3C is SEQ ID NO：82).Each parent toxin-II variations are respectively provided with after HSA cuttings carrys out Self cleavage The remaining N- ends GP in site.
Variation is characterized in following determination method：Such as embodiment 3Described in Tetra membrane depolarization determination methods, UseTetra carries out membrane depolarization determination method；And carried out using QPatch determination methods as described in Example 3 Whole-cell patch-clamp is tested.
Combinatorial libraries are designed in the trial of generation Nav1.7 antagonists the adduction of single position hit selected by test Effect, it has the effect further improved compared to native peptides and selectional feature.
The structure of expression vector
Use the designed parent toxin-II of the synthetic gene component technology generation described in United States Patent (USP) US6,521,427 Variant gene.The amino acid sequence retroversion of designed peptide variation is DNA sequence dna by user's high frequency AC pulse Link.Each variation base The DNA sequence dna of cause synthesizes multiple oligonucleotides together with a part for the carrier DNA comprising DNA clone site, these few cores Some in thuja acid include degenerate codon, and are assembled into full length DNA fragment.The DNA fragmentation assembled by PCR amplification, with It is afterwards storehouse by PCR product clone.By PCR product storehouse with appropriate restriction Enzyme digestion, and so that each toxin variant gene melts It is bonded to the signal peptide included in carrier and the cleavable peptides of fusion partner 6 × His-HSA- connectors-HRV3C (is disclosed as SEQ ID NO：108 " 6 × His ") mode be cloned into the expression vector of design.It is each using standard molecular biological technique identification The positive colony of design variable.The Plasmid DNA of these positive colonies is purified, first confirms sequence, it is former to reuse standard method expression Toxin I I peptide variant fusion proteins.
Protein expression
HEK 293-F cells are maintained at 293 FreestyleTMIn culture medium (Invitrogen catalog number (Cat.No.)s 12338), when Cell concentration is between 1.5 × 106With 2.0 × 106Sub-bottle when between a cell/ml.By cell in 37 DEG C and 8%CO2Under be incubated at In suspension in humidified incubator, and shaken with 125RPM.1.0 × 10 are diluted in HEK 293F cells6A cell/ After ml, transiently transfected using DNA/ lipid complexes.To generate compound, the transfection thing of 1.25 μ g DNA/ml is diluted in In 1.0ml OptiPro culture mediums (Invitrogen catalog number (Cat.No.)s 12309), and by 1.25ml FreestyleTMMax transfection examinations Agent (Invitrogen catalog number (Cat.No.)s 16447) is diluted in 1.0ml OptiPro culture mediums.DNA and Max transfection reagents are blended in Together, and incubate 10 minutes, then add in cell at room temperature.By the cell of transfection in 37 DEG C, 8%CO2Humidifying culture Place 4 days in case, and shaken with 125RPM.Supernatant is separated and filtered from cell by being centrifuged 10 minutes with 5,000 × g Cross 0.2 μm of filter (Corning；Catalog number (Cat.No.)：431153), then with Amicon Ultra inspissator 10K (catalog number (Cat.No.)s： UFC901096 10 times and 50 times) are concentrated, and with 3,750 × g is centrifuged about 10 minutes.
Embodiment 2：The purifying of parent toxin-II variations
As pointed by embodiment 1, parent toxin-II variations are expressed as HSA fusion proteins, and carrying out purifying it It is preceding that parent toxin-II variant peptides are cut using HRV3C protease.It is whether effectively pure with two methods test parent toxin-II variations Change.
Protein purification
Parent toxin-II variations are purified by RP-HPLC
Using 1ml HisTrap HP columns (GE Healthcare catalog number (Cat.No.) 17-5247-01) by IMAC from expression supernatant The purifying secreted albumen of liquid.Chromatography is run using AKTA Xpress, and is washed protein from column using the imidazoles of stepwise gradient It is de-.Merge peak value fraction and with the digestion of HRV HRV 3CPs overnight (1 μ g protease/150 μ g fusion).
Using with anti-phase 5 μm of C18 (2) columns (catalog number (Cat.No.) 00B-4252-P0-AX) of Phenomenex Luna Cutting peptide fusion storehouse is further purified in Dionex HPLC systems.Eluted with 0-68% acetonitriles (0.05%TFA) linear gradient from column Sample.Merge elutriated fraction, freeze overnight and pH7.4 HEPES buffer salt solutions (10mM HEPES, 137mM NaCl, 5.4mM KCl, 5mM glucose, 2mM CaCl2、1mM MgCl2) in restore.
Table 4 shows the yield of the parent toxin-II variations by RP-HPLC purifying.Average yield is 0.01615mg/L.
Table 4.
Parent toxin-II variations are purified by Solid Phase Extraction (SPE)
Using 1ml HisTrap HP columns (GE Healthcare catalog number (Cat.No.) 17-5247-01) by IMAC from expression supernatant The purifying secreted albumen of liquid.Chromatography is run using AKTA Xpress, and is washed protein from column using the imidazoles of stepwise gradient It is de-.Merge peak value fraction and with HRV3C protease digestions overnight (1 μ g protease/150 μ g fusion).By the sample loading of cutting Collected to 50kDa molecular weight retention Centrifugal Filter Unit (Millipore UFC805096), and by cutting peptide in filtrate fraction In.
Peptide storehouse is loaded to 96 hole Solid Phase Extraction blocks (Agilent Bond Elut Plexa A3969030) to be used for into one Step purifying, desalination simultaneously concentrate.Block is used in combination with vacuum manifold (Whatman).By peptide sample loading, water is being dissolved in Wash in 0.05%TFA, and eluted with the acetonitrile of stepwise gradient with the 0.05%TFA for being dissolved in water.Then elutriated fraction is frozen It is dry overnight, and pH7.4 HEPES buffer salt solutions (10mM HEPES, 137mM NaCl, 5.4mM KCl, 5mM glucose, 2mM CaCl2、1mM MgCl2) in restore.
Peptide is in supplement HEPES buffer salt solutions (10mM HEPES, 137mM NaCl, 5.4mM KCl, the 5mM Portugals of pH 7.4 Grape sugar, 2mM CaCl2、1mM MgCl2) in restore, and measure the absorbance under 280nm.Then the delustring system of each sample is used Number calculates concentration value.Every kind of peptide of 2 μ g is loaded to InvitrogenTri- s Gel 15 of Bis- On the gel of hole, and glue is run in irreducibility MES buffer solutions.
Analyzed using the 4%-80% acetonitriles and Phenomenex Luna C18 (2) for the linear gradient for being dissolved in 0.05%TFA Column (catalog number (Cat.No.) 00A-4041-B0) analyzes sample on 1100 HPLC of Agilent.The concentration of all peptides is normalized, it is every kind of Peptide injects 10 μ l, each sample 1.3 μ g altogether.The absorbance under 220nm is monitored, and chromatography is carried out using Chromeleon softwares Analysis.
Table 5 shows the yield (mg) of the parent toxin-II variations by SPE purifying.Average yield is 0.05353mg/L.
Because sample parallel processing in 96 orifice plates in SPE purge processes, rather than the continuous processing on RP-HPLC, because And have the advantages that simple and purifying flux is high, and yield is improved.Pass through the yield (mg/L) of the variation of SPE purifying It is average more than 3 times by the yield of the variation of RP-HPLC purifying.
Table 5.
Embodiment 3：The characterization of parent toxin-II variations
Selected parent toxin-II variations are characterized with membrane depolarization and whole-cell patch-clamp determination method, right to assess them In the effect and selectivity of Nav1.7.
Tetra membrane depolarization determination methods
Existed using FRET (fluorescence resonance energy transfer) determination methodGenerated peptide is measured on Tetra to suppress Nav1.7 activators veratridine (3- veratroyl protocevines；Biomol, Catalog#NA125) induction membrane depolarization energy Power, which is used as electron acceptor using DISBAC2 (3) (Invitrogen, K1018), and uses PTS18 (8- octadecanes Base oxygen pyrene -1,3,6- trisulfonic acids trisodium) (Sigma) be used as donor, by the excited donor under 390nm-420nm, and measure FRET under 515nm-575nm is carried out.
By the HEK293 cells for stablizing expression people Nav1.7 be supplemented with 10% hyclone, 1% penicillin/streptomycin, 400 μ g/mL Geneticins and the DMEM/F-12 culture mediums (1: 1) of 100 μM of NEAA (all reagents are purchased from Invitrogen) Middle culture.The cell of 50 μ L harvests is taped against to 384 hole black transparent bottom plates of polylysine coating with 25,000 cells/wells In.Plate incubates 15min under room temperature (RT), then the overnight incubation at 37 DEG C.Unless otherwise stated, all incubations exist It is black undercover.Next day, with measure buffer solution (137mM NaCl, 4mM KCl, 2mM MgCl2、2mM CaCl2, 5mM glucose, 10mM HEPES, pH7.4) hole is washed 4 times, and hole is resuspended in 25 μ L measure buffer solutions.By by dyestuff with 1: 1 (v/v Than) ratio be suspended in 10% Pluronic (Pluronic) F127 for be dissolved in DMSO and to prepare 2 times of PTS18 stock staining solutions (6μM).By in 2 times of PTS18 stoste adding holes of 25 μ L, and make cell dyeing 30min at room temperature, then with measure buffer solution Wash dyestuff off.Peptide is suspended in the measure comprising 10 μM of DISBAC2 (3) and 400 μM of VABSC-1 with 3 times of final concentration to buffer In liquid, to suppress background fluorescence (Sigma, catalog number (Cat.No.) 201987).Suspension peptide is added in each hole with the amount in 25 μ L/ holes, and Incubate 60 minutes at room temperature.Pole is gone by veratridine (by 75 μM of 3 times of stostes for adding 25 μ L/ holes) induction of 25 μM of final concentrations Change, the mean intensity that FRET dye fluorescences are measured after adding activator 30-100 seconds is reduced.By convention, after adding veratridine Each measured peptide dilutes 1.3 times, recordConcentration when Tetra determination methods start.
The concentration-response curve of the synthesis parent toxin-II (Peptide International) of each experimentalists and technicians is built, And as control.By being negative control value (response to independent activator veratridine) and positive control by signal normalization The fluorescence in each hole is counted conversion by the difference between (response in the case of there are 10 μM of totokaine to veratridine) value Responded for %.In measurement," spatially uniform correction " is opened in Tetra (to normalize all fluorescence traces For averagely initial initial intensity) and " difference deviant " (subtracting initial initial intensity from every trace).Each data point represents The response in single hole.All individual data points are used during nonlinear least square fitting using Origin (Microcal) Search the best fit of Hill functions.IC is extracted from the matched curve of gained50Value.Use the flat of positive (P) and negative (N) control Respond and calculate % responses according to the following formula：% responses=100* (N-R)/(N-P).
If the effect of this day control antagonist is within ± 0.5 log unit of its history average, the assay plate It is acceptable.
QPatch determination methods
Expression people Nav1.5 (SEQ ID NO will be stablized：105)、Nav1.7(SEQ ID NO：Or Nav1.6 (SEQ ID 79) NO：407) HEK293 cells be supplemented with 10% hyclone, 1% penicillin/streptomycin, 400 μ g/mL Geneticins and Culture in the DMEM/F-12 culture mediums (1: 1) of 100 μM of NEAA (all reagents are purchased from Invitrogen).Cell is maintained at At 37 DEG C and 5%CO2In, and measured when reaching about 50%-90% degree of converging.The Chinese hamster ovary celI of expression people Nav1.6 will be stablized (the SEQ ID NO in a manner of tetracycline induces：407) 10% hyclone, 1% penicillin/streptomycin, 10 μ g/ are being supplemented with Cultivated in the HAMsF12 of mL blasticidin Ss and 400 μ g/mL bleomycin.By cell be maintained at 37 DEG C and 5%CO2 in, and It is measured when reaching about 50%-90% degree of converging.The 24-48h 1 μ g/ml tetracyclines induction Nav1.6 expression before experiment.
Before being tested in QPatch HT (Sophion), first using 0.05% trypsase (5min, 37 DEG C at) Dissociated cell, cell is resuspended in CHO-S-SFM culture mediums (Life Technologies), and is lightly ground to broken thin Born of the same parents' agglomerate.Cell density is adjusted to 1-2 × 10 with identical culture medium6/ mL, cell is transferred to thin in QPatch HT Born of the same parents " hotel " and the experiment for being used for a few hours.For begohm resistive seal formed and Whole-cell recording, extracellularly Solution includes 137mM NaCl, 5.4mM KCl, 1mM MgCl2、2mM CaCl2, 5mM glucose and 10mM HEPES, pH=7.4 And osmolarity=315mOsm.Intracellular solution include 135mM CsF, 10mM CsCl, 5mM EGTA, 5mM NaCl and 10mM HEPES.pH=7.3 and osmolarity=290mOsm.Voltage schemes used in determination method are as follows.Cell is first from guarantor Current potential -75mV (Nav1.7), -60mV (Nav1.6) or 2 seconds extremely -120mV of -105mV (Nav1.5) hyperpolarization are held, is then depolarized 5ms to 0mV, is then returned to holding current potential.The program is repeated once (see below) in every 60 seconds during liquid application.Not When performing above-mentioned voltage schemes, then cell is held in holding current potential.When establishing whole-cell recording technique pattern, to be recorded thin Born of the same parents apply five Extracellular solutions (comprising 0.1% bovine serum albumin(BSA) (BSA), while with or without test chemical combination altogether Thing, but except last time administration, the Extracellular solution applied for the last time includes 1 μM of TTX or 10mM lidocaine as sun Property control).First time liquid application is only comprising control buffer solution (5 μ l).Voltage schemes are performed after applying five seconds 10 times (altogether Continue 10 minutes).Ensuing liquid application three times (5 μ l every time) includes the test compound (compound all applied three times It is identical, concentration is identical) or control buffer solution (being only applied to control cell).After applying five seconds every time, voltage side is performed again Case 10 times (same per minute once).Last time, which is applied, (to be applied by l level of 10 μ three times and formed, between each comprising positive control Every 2 seconds), perform identical voltage schemes twice after five seconds, obtain base current.To current sampling under 25kHz, the ends of the earth is used Point Bezier (Bessle) wave filter filters under 5kHz.Series resistance compensation level set is 80%.For each cell, In the case of there are positive control, each current trace in preceding four liquid applications is subtracted from the amplitude of last time trace first and existed Peak current amplitude under 0mV, the amplitude for the last time trace being then normalized to during (control buffer solution) is applied for the first time, makees Suppress for %.In order to control electric current decline, exist test compound in the case of, by the value (% inhibiting values) of each cell into One step is normalized to the average % inhibiting values of control cell in same experiment (usual 5-6).Applied in last time compound In, using the average value (that is, the correction % inhibiting values of the test compound of each concentration) of upper value such twice as what is tested The % inhibiting values of each cell under specific compound concentration.The % inhibiting values of all test cells under each compound concentration are taken Average value, calculates for concentration-response.All experiments carry out (about 22 DEG C) at room temperature.Data are expressed as average value ± SE. Wild type parent toxin-II is included in each experiment as positive control.Only the effect of parent toxin-II is in history average Within ± 0.5 log unit, data are only acceptable.
Table 6 shows useThe IC for Nav1.7 for the selected parent toxin-II variations that Tetra is obtained50 Value.
Table 6.
Using QPatch test selected by parent toxin-II variations to the selectivity of people Nav1.5.Table 7 is shown using QPatch IC of the selected peptide obtained for both Nav1.7 and Nav1.550Value.
Table 7.
Embodiment 4. combines preparation and the characterization of parent toxin-II variations
Combinatorial libraries are designed in the trial of generation Nav1.7 antagonists the adduction of single position hit selected by test Effect, compared with native peptides, its effect and selectional feature are further improved using a variety of methods.
Limiting amino acid scanning is carried out to all non-cysteine parent toxin-II positions using A, D, Q, R, K and S, makes this A little position variations.As described in Example 1 like that, in these experiments, using parent toxin-II as unit price Fc fusion proteins into Row expression and test.Identified from the scanning make gained variation effect and/or be selectively improved displacement Y1Q, W7Q、S11A。
All amino acid scanning (in addition to cys and trp) also is carried out to position M6 and M19.Being identified from the scanning makes institute The effect of the variation obtained and/or the M19F displacements being selectively improved.
Bidirectionally design the single position chimeras of parent toxin-II/ bird catching arachinid toxin Is V.The purpose in the library is to obtain The effect of wild type parent toxin-II and the parent toxin-II variations of selectional feature must be kept, and can be realized and Selenocosmiahuwena The relevant favourable refolding characteristics of toxin I V.Displacement R22T and E12N is identified from the scanning.
Make position Y1 diversified by using the limiting amino acid scanning of R, K, T, A, D, E, Q and S, and pass through electric charge cluster It is engineered to be further engineered peptide NV1G1153, wherein in the three-dimensional structure (D10/E12, K4/E17, D10/E12/R13) of peptide In all charged residues groups be mutation.
The extension of N- ends and the extension of C- ends are introduced to the selected peptide including NV1G1153, it is therefore an objective to do not increasing significantly In the case of the molecular weight for adding the peptide of gained, the peptide distribution in improvement result site and the half-life period for improving peptide.N- ends used End extension and the extension of C- ends are shown in table 8 and table 9, and in Oi et al., Neuroscience Letters 434, 266-272,2008；Whitney et al., Nature Biotechnology 201129：4,352-356；Sockolosky etc. People, (2012) 109：It is described in 40,16095-16100.Cell permeable peptide HIV Tat and poly arginine can also be used.Make Parent toxin-II variations are coupled to the extension of N- ends with various terminal and/or C- ends extend.Connector used is shown in table 10 In.
Use effect and selection of the parent toxin-II variations of each activity of method test described in embodiment 3 to Nav1.7 Property.Suppress Nav1.7 and IC50The amino acid sequence for being worth the variation for 200nM or smaller is shown in Table 3.Table 11 is shown and wild type The IC that Nav1.7 suppresses in amino acid replacement in the selected variation that parent toxin-II is compared, and FLIPR Tetra determination methods50 Value.
Table 8.
Table 9.
Table 10.
Table 11.
As described in Example 3 like that, wild type parent toxin-II suppresses Nav1.7, in FLIPR determination methods, its IC50Value It is about 4nM.The variation for keeping notable Nav1.7 effect is further characterized.Fig. 1 show generated suppression Nav1.7 and IC with 30nM or smaller50The sequence category of the parent toxin-II variations of value.
Using QPatch test selected by suppression of the parent toxin-II variations to Nav1.7 and the selectivity to people Nav1.6. Fig. 2 is shown with IC of the selected peptide for both Nav1.7 and Nav1.6 of QPatch acquisitions50Value.These peptides suppress Nav1.7, Its IC50Be worth for 30nM or smaller, and these peptides to the selectivity of Nav1.7 is to the selectivity of Nav1.6 at least 30 times.
Fig. 3 shows the amino acid sequence of peptide as shown in Figure 2.Compared with wild type parent toxin-II, all these peptides are equal Replaced with W7Q and M19F.
Express as described in Example 1 and purify parent toxin-II variations, or the variation is synthesized by standard solid-phase synthetic method. By the yield of recombinantly or synthetically peptide compared with the yield of wild type parent toxin-II.Table 12 shows selected parent toxin-II variations Yield be noticeably greater than the yield of parent toxin-II, showing the folding characteristic of variation improves.The scale of synthesis in solid state is 0.5mmol.
Table 12.
5. parent toxin-II variations of embodiment are in vivo effective material and method in pain model
AnimalThis research uses the male C57Bl/6 mouse (24g-26g) for being purchased from Charles River and individually raising.
Performance testing
Von Frey are tested：(touched according to previous-next method assessment machinery using the Von Frey Hairs cilium mechanical stimulus crowns Feel) threshold value (Dixon, 1980, Chaplan et al., 1994).Use 7 grades of stimulation (von Frey filaments：0.03、0.07、0.16、 0.4、0.6、1、2g；Stoelting, Wood Dale, IL).Middle section by cilium mechanical stimulus pin perpendicular to metapedes sole (between anchor ring) is placed.Applying enough power makes filament slight curvature and is kept for 3 seconds.According to the article of Chaplan, positive response can To be 1) drastically paw withdrawal or 2) paw withdrawal immediately when filament removes.More details referring to Chaplan et al. article.Surveyed Mouse is set to adapt to silk screen 30-60 minutes in test cabinet before examination.
Hargreaves is tested：Use the improved sufficient incubation period (PWL) of Hargreaves boxes measurement pyrocondensation (Hargreaves et al., 1988, Pain, 32: 77-88；Dirig et al., 1997, J Neurosci.Methods, 76: 183- 191).The box is made of the room with rise glass plate, which is maintained under constant temperature (27 DEG C).Throwing below glass surface Shadow light bulb light beam produces heat injury intereceptic stimulation.Region (sole center) between the light beam acquiring anchor ring.START button Illumination will be opened and start timing.Trigger switch is closed illumination and stopped by the movement (such as unexpected paw withdrawal) that pawl is stimulated and produces Only timing.Incubation period is shown with the second.If do not moved, light bulb will close (cut-off) to prevent tissue from damaging after 20 seconds Wound.Before PWL measurements, first make animal custom glass surface 30-60 minutes.Constant amperage is used in whole research, when At least be separated by 5 minutes collection average more than 3 to 6 readings when, obtained pretest paw withdrawal incubation period is between 8-12 seconds.
MPE% is calculated：Maximum possible effect percentage (MPE%)=(T1-T0)/(Tc-T0) × 100%.T0：0th day Threshold value (after CFA, before pump implantation)；T1：The threshold value of the 1st day after pump implantation；Tc：Test ends (is in Hargreaves tests It is 2g in 20s, Von Frey tests).
Hot plate is tested：Animal is placed on 10 " × 10 " metallic plates that 4 plexiglas walls (15 inches high) surround.By plate It is maintained at a temperature of 50 DEG C or 55 DEG C.Measurement response incubation period (animal first time paw withdrawal or lick metapedes, jump or sounding when Between) and move up away animal from plate.The animal for not showing response is removed from plate after 40s (50 DEG C) or 20s (55 DEG C), to prevent Only any possible tissue damage.The experiment repeated 2-5 times in one day per 15-60 minutes.
Inflammatory pain model
CFA models：With isoflurane (induced with 4% concentration and be maintained at 2%) anesthetized animal, and use is attached to 50 μ L No. 27 pins of Hamilton syringes are by 20 μ L, 100% complete Freund adjuvants (CFA；Sigma-Aldrich；Saint Louis, MO) injection one metapedes vola middle section.
Carrageenan model：With isoflurane (induced with 4% concentration and be maintained at 2%) anesthetized animal, insulin is used Syringe (BD；Franklin Lakes, New Jersey) 25 μ L are dissolved in 2% λ-carrageenan of physiological saline (Sigma-Aldrich；Saint Louis, MO) injection metapedes vola middle section.
The implantation of micropump
Filled according to the guide of manufacturer and irrigate the micro- osmotic mini-pumps of Alzet (Durect Corporation, 1003D Type and 2001D types).(induced with isoflurane with 5% concentration；And it is maintained at 2%) anesthetized mice.Light mouse back is shaved, use is different Propyl alcohol and polyvinylpyrrolidone wipe, and small notch is made between shoulder blade.It is subcutaneous with a pair of of pliers or haemostatic clamp expansion Connective tissue, forms small rut.Pump is inserted into pit, and flow conditioner is directed toward the direction away from notch.Then 7mm is used Staple skin suture notch, animal are restored in cage nest.
Data analysis
Data are expressed as average value ± s.e.m.Use Prism (Graphpad Software Inc., La Jolla, CA) Drawn and statistical analysis.Then comparison for threshold value and time, Bonferroni is carried out using two-way analysis of variance Multiple range test is tested, and significance is p ＜ 0.05.One-way analysis of variance is carried out to hot plate and MPE% data and then is carried out Bonferroni Multiple range tests are tested.
As a result
In the common CFA models of inflammatory pain model-mono- study variation NV1D3034-OH (NV1D3034-COOH), The effect of NV1D3368-OH (NV1D3368-COOH) and NV1D2775-OH (NV1D2775-COOH).CFA injection metapedes inductions Pawl edema (not shown) and the hypersensitivity (thermal hyperalgesia) to thermostimulation, such as by the injection pawl hot incubation period of the 0th day (Fig. 6 A) shown in reduction.It is complete using NV1D3034-OH with the amount of 684 μ g/ days and 1824 μ g/ days by subcutaneous osmotic minipump Thermal hyperalgesia (Fig. 4 A and Fig. 4 B) is reversed.
The NV1D3368-OH of 684 μ g/ days and 1824 μ g/ days reversed completely CFA induce thermal hyperalgesia (Fig. 5 A and Fig. 5 B).NV1D2775-OH shows stronger effect in CFA models.After NV1D2775 is applied, hot incubation period, which reaches, to be connect Value (Fig. 6 A and Fig. 6 B, 1824 μ g/ days) during nearly cut-off, shows that the limit in anti-hyperalgia effect is imitated with strong analgesia Should.In addition, NV1D2775-OH has reversed the paraesthesia pain quick (Fig. 6 C and Fig. 6 D, 1824 μ g/ days) that CFA is induced.It can be planted in pump Enter rear 4 it is small when observe the anti-hyperalgia effect (Fig. 7 A) of NV1D2775-OH.The effect is small 8 in heat and tactile test When reach maximum (Fig. 7 A and Fig. 7 B), the two test keep 24 it is small when.Hot incubation period and haptic threshold are implanted into 48h in pump After return to control level (pump implantation after about 24h be predicted to be blank) (Fig. 7 A and Fig. 7 B).
The thermal hyperalgesia of CFA inductions is easy to be reversed by two other peptides：NV1D3368- acid amides (NV1D3368-NH2) With NV1D3034-N- methyl nitrosoureas (NV1D3034-NHMe).The hot MPE% of the experiment is summarized in table 13.
Table 13.
NV1D2775-OH also shows strong dose dependent effect (Fig. 8) in hot plate test.With 1824 μ g/ days into After row is applied, the incubation period at 50 DEG C and 55 DEG C reaches close to value during cut-off.Compared with PBS control, 228 μ g/'s days NV1D2775-OH causes hot incubation period appropriateness but significantly increases.
In another inflammatory pain model --- the effect of NV1D2775-OH is assessed in carrageenan model.Animal is planted Enter NV1D2775-OH or PBS pumps.1st day measurement pyrocondensation sufficient incubation period before pump is implanted into and after implantation.By λ-angle fork Dish glue inject metapedes, carrageenan injection after 2 it is small when, 3 it is small when and 4 it is small when measure hot incubation period again.1824 μ g/'s days NV1D2775-OH generates significant analgesia phenomenon.(Fig. 9).Metapedes injection λ-carrageenan (does not show induction of inflammation Go out), and Hargreaves test 4 it is small when the test phase in pyrocondensation foot shorter latencies (Fig. 9, PBS group).With 1824 μ g/ The animal of it NV1D2775-OH pretreatments completely avoid the hyperalgia of carrageenan induction.
Embodiment 6. combines preparation and the characterization of parent toxin-II variations
Amino acid scan base of the generation for parent toxin-II.At each non-cysteine position of parent toxin-II (Tyr1、Gln3、Lys4、Trp5、Met6、Trp7、Thr8、Asp10、Ser11、Glu12、Arg13、Lys14、Glu17、 Gly18, Met19, Va120, Arg22, Leu23, Trp24, Lys26, Lys27, Lys28, Leu29 and Trp30), with natural residual Base replaces following residue：Ala、Asp、Glu、Phe、Gly、His、Ile、Lys、Leu、Asn、Pro、Gln、Arg、Ser、Thr、 Val and Tyr.
Mutant peptide is expressed as the restructuring fusions of human serum albumins, and digestion using HRV3C locus specificities with Parent toxin-II the variations of generation as described in example 1 above.Each parent toxin-II variations are respectively provided with after HSA cuttings carrys out Self cleavage The remaining N- ends GP in site.For every kind of parent toxin-II variations, according to the scheme described in embodiment 3, FLIPR is used IC of the Tetra or Qpatch measurements for people Nav1.750Value.Using Qpatch electrophysiology, to being shown for people Nav1.7 IC50The variation of≤100nM carries out counter-selection choosing, to obtain the selectivity to other hNav passages.Selectivity hit is identified to be used in combination In the design of combination peptide library, which is produced using both recombination expression and Solid phase peptide synthesis.Using detailed with more than State identical Policy Filtering combinatory variants.
Based on as a result, can it is mutated with improve selectivity position include Gln3, Serll, Glu12, Lys14, (residue numbering is according to SEQ ID NO by Glu17, Gly18, Leu29 and Trp30：Depending on 1).
The solution structure of parent toxin-II is measured by NMR, and is expressed as surface in Fig. 10.The left-hand side of figure is shown Previously described (Park et al., J.Med.Chem.2014,57：6623-6631), around the W5/W7/W24Trp residues of M6 Ring.In the opposite side of molecule, using both mutagenesis and NMR structures, identify be made of multiple amino acid positions in our current research Parent toxin-II selective face, which can be mutated to improve selectivity of the hNav1.7 to other sodium channel hypotypes.It is located at Residue on selective face includes residue Ser11, Glu12, Lys14, Glu17, Gly18, Leu29 and Trp30 (residue numbering root According to SEQ ID NO：Depending on 1).The identification of the previous multiple positions not being responsible for the selectivity of Nav1.7 selective face and Qi Nei It is described.
The improvement at Ser11 with the parent toxin II variations of displacement is selectively unexpected, because previously Proving the mutation of Ser11 influences the activity of multiple Nav passages, therefore residue is considered the selection in parent toxin-II to Nav1.7 Do not work (Park et al., J.Med.Chem.2014,57: 6623-6631) in property.
Committed step during parent toxin-II variations are synthetically produced is that the oxidation for the linear peptides to form disulfide bond pairing is rolled over again It is folded.The RP-HPLC traces of natural parent toxin-II purifying after refolding show multiple peaks at different retention times, It shows the activity of varying level with correct quality, represent peptide the isomers correctly and incorrectly folded it is mixed Compound.
By the way that the relative abundance of RP-HPLC main peaks can be improved into line replacement at various parent toxin-II positions, so as to improve The relative abundance of the peptide correctly folded.The mutation of Trp7 or Trp30 improves the folding of the parent toxin-II variations of gained.Trp7 Mutation with both Trp30 combination further improves the folding of the parent toxin-II variations of gained, and can save and be difficult to again The folding of the parent toxin-II variations of folding.
With the one or more for improving selectivity (Gln3, Ser11, Glu12, Lys14, Glu17, Gly18 and Leu29) The production of the combination mutant peptide of displacement and the mutation at Trp7 and Trp30 has been obtained with improved selectivity and improvement Both refolding characteristics peptide.Parent toxin-II belong to suppressive cysteine knot polypeptide family 3 (Klint et al., Toxicon 60：478-491,2012).Trp7 is conservative in all 3 members of family, and the displacement at this position with And the displacement at the Trp5 and Met6 in another 3 suppressive cysteine knot peptide jingzhao toxin V of family causes effect to be lost Lose, show that the hydrophobic residue at the position 5,6 and 7 in jingzhao toxin V is imitated for jingzhao toxin V Nav1.7 suppressive Power is most important (international patent publications 2014/165277).Trp5/Met6/Trp7 is also what is guarded in parent toxin-II, because This surprisingly, the displacement of polarity at Trp7 can be carried out in the case where not losing parent toxin-II activity, be had notable Improved refolding characteristic.Displacement at Trp30 show and meanwhile improve variant peptides Nav1.7 selectivity and refolding characteristic, And it is unexpected, because single favourable displacement usually only improves single parameter.
Table 13 shows the amino acid sequence of the parent toxin-II variations of selected generation.
Table 14.
Using FLIPR Tetra or Qpatch as described in Example 3, to selected variation for its suppression to Nav1.7 Characterized.Table 15 shows obtained IC50Value.For some variations, only recorded under single concentration (10nM or 30nM) The % of Qpatch suppresses (%blk；The blocking percentage of tester).
Table 15.
For variation selected by various people Nav1.x lane testings.Table 16 shows the result of those experiments.Surveyed using QPatch Measure the IC of each passage50Value.
Table 16.
Express as described in Example 1 and purify parent toxin-II variations, or the variation is synthesized by standard solid-phase synthetic method. By the yield of recombinantly or synthetically peptide compared with the yield of wild type parent toxin-II.Table 17 shows selected parent toxin-II variations Yield be noticeably greater than the yield of parent toxin-II, indicate the improved folding characteristic of variation.The scale of synthesis in solid state is 0.1mmol。
Table 17.
7. parent toxin-II variations of embodiment in pain model are in vivo effective after intrathecal drug delivery
Parent toxin-II variations mitigate the effect of pain after intrathecal drug delivery selected by assessment.
Peptide NV1D2775-OH, NV1D3034 and 63955918 are used under study for action.Use the acute hot pain (whipping of measurement And hot plate) and damage induce pain (formalin is shunk back) animal model.
Whipping test：Animal is placed on tail flick apparatus (Ugo Basile).The device has focus infrared heating area Domain (5 millimeters of diameter).The tail of animal is placed in focus heating region (at distal end 1/3-1/2).Adjust the temperature of heat source Degree, to trigger whipping in the animal handled with medium in 10 seconds.Tissue damage is prevented using the deadline of 15 seconds, As the standard in document.Automatic measurement thermostimulation starts and any time avoided between response, and records test group.
Hot plate is tested：Animal is placed on 10 " × 10 " metallic plates that 4 plexiglas walls (15 inches high) surround.By plate It is maintained at a temperature of 52.5 DEG C.Measurement response incubation period (animal first time paw withdrawal or lick its metapedes, jump or sounding when Between) and move up away animal from plate.The animal for not showing response is removed from plate after 30s, to prevent any possible tissue Damage.
Formalin is shunk back：Induced using automation " withdrawing reaction " measuring device measurement formalin manufactured by UCSD Pain behaviour (that is, shrinking back enough).The device using the motion sensor below bottom of device come detect be glued to it is dynamic Any movement suddenly of metal tape on one metapedes of thing.Half an hour to one hour, uses droplet before formalin injection Small metal tape is attached to the plantar surface of a metapedes by cyanoacrylate, and animal is placed in test cabinet to adapt to ring Border.With metal tape by formalin (2.5%, 50 μ L) subcutaneous injection to instep.Immediately will be dynamic after subplantar injection formalin Thing is put into the cylinder (25 × 10 × 20em, San Diego Instrument) of customization.Automatic record foot is shunk back.
In acute heat pain model, parent toxin-II variations 63955918 produce effect and long-acting analgesic, such as in single sheath After interior administration in whipping test (Figure 11 A and Figure 11 B) and hot plate test (Figure 11 C, Figure 11 D) indicated by elevated incubation period Like that.Analgesic conspicuousness and duration are dose-dependent.
Metapedes formalin injection is the model of the pain of common wound inducement.The two-phase of injection induced character is shunk back Behavior, it indicates the pain of test animal.As depicted in fig. 11E, pre-processed with intrathecal injection parent toxin-II variations 63955918 Animal shows the less suppression shunk back, show the pain of wound inducement in formalin test.
Similarly, after single intrathecal drug delivery, peptide NV1D2775-OH and NV1D3034 is in whipping, hot plate and formalin Shown in test (Figure 12 A, Figure 12 B, Figure 12 C, Figure 12 D, Figure 12 E, Figure 13 A, Figure 13 B, Figure 13 C, Figure 13 D, Figure 13 E) significantly The effect of.
The characterization of the other variation of parent toxin-II of embodiment 8.
Other parent toxin-II variations are designed and express using the strategy described in embodiment 6 and method, and according to implementation Scheme described in example 3 is characterized in FLPR Tetra and/or Qpatch.
Table 18 shows the amino acid sequence of the parent toxin-II variations of selected generation.
Table 18.
Using FLIPR Tetra or Qpatch as described in Example 3, to selected variation for its suppression to Nav1.7 Characterized.Table 19 shows obtained IC50Value.For some variations, only recorded under single concentration (10nM or 30nM) The % of Qpatch suppresses (%blk；The blocking percentage of tester).se：Standard error.
Table 19.
The generation of the variation of embodiment 9. 63955918
When compared with wild type parent toxin-II, there is parent toxin-II variations 63955918 W7Q and W30L to replace.Strictly according to the facts To apply described in example 6, the mutation of both Trp7 and Trp30 alone or in combination improves the folding of the parent toxin-II variations of gained, and The folding for the parent toxin-II variations for being difficult to refolding can be saved.
Other variation is generated on 63955918 skeletons, to assess the possibility for further improving characterization of molecules.Some Variation is also described in embodiment 6 and 7.
The variation and its sequence of generation are shown in Table 20.
Table 20.
Characterization variation as described above.Table 21 shows IC50Value and/or retardance percentage (%blk) (compared with control sample, The % of electric current suppresses).Se：Standard error.
Table 21.
The generation of the variation of embodiment 10.63955918
The other variation of design 63955918, to improve the bio distribution of the peptide of gained.
W7 and W30 displacements are also designed on a variety of 3 suppressive cysteine knot peptides of family, are provided with assessing these mutation Improved selectivity and improve refolding characteristic whether be enlarged beyond parent toxin-II to the peptide sequence of other very high homologies. Suppress 3 spider toxin of family of Nav passages (NaSpTx), such as by Klint et al. (Toxicon 60：478-491,2012) limit As, it is chosen as (numbering based on Seq ID 1) for the stent of the Q at binding site 7 and the L at position 30, and wrap Include).These sequences are caught including β-catching bird spider toxin-Gr1c, β-catching bird spider toxin-Gr1e, β/κ-catching bird spider toxin-Cg2a, κ- Tarantula toxin-Ps1a, κ-catching bird spider toxin-Ps1b, κ-catching bird spider toxin-Gr2b, κ-catching bird spider poison rope-Gr2c, κ-catching bird spider Toxin-Gr2d, κ-catching bird spider toxin-Cg2a, κ-catching bird spider toxin-Cg2b, κ-catching bird spider toxin-Ec2c, β-catching bird spider toxin- Gr1d, β/κ-catching bird spider toxin-Pm2a, κ-catching bird spider toxin-Ec2a and κ-catching bird spider toxin-Ec2b.
In Arachnoserver (http：// _ www_arachnoserver_org/_mainMenu_html) in identify Other family's 3NaSpTx stents for mutation.The arrangement of 3 toxin of family is as shown in figure 14.
Table 22 shows the sequence of designed variation.
Table 22.
The variation of the introducing alpha-non-natural amino acid of gained is generated by standard solid-phase peptide symthesis and Oxidative Refolding method.
The variation of peg groups is connected with by standard chemical conjugation method generation.
The variation for testing gained suppresses Nav1.7's in FLIPR Tetra as described in Example 3 and QPatch measure Ability.
Use the selectivity of the variation of the method Self -adaptive described in embodiment 3.

Claims (34)

1. a kind of separated parent toxin-II variations for suppressing people's Nav1.7 activity, are selected from wherein the parent toxin-II variations have At least one amino acid replacement of W7Q and W30L；Wherein residue numbering is according to SEQ ID NO：Depending on 1.
A kind of 2. separated parent toxin-II variations the, wherein parent toxin-II variations suppress the activity of people Nav1.7, its IC50Value It is about 1 × 10-7M or smaller, about 1 × 10-8M or smaller, about 1 × 10-9M or smaller, about 1 × 10-10M or smaller, about 1 × 10- 11M or smaller or about 1 × 10-12M or smaller, wherein the IC50Value is in the HEK293 cells for stablizing expression people Nav1.7 There are 25 × 10-6Fluorescence resonance energy is used in the case of M 3- veratroyls protocevines (3-veratroylveracevine) (FRET) is shifted to useTetra membrane depolarizations determination method and measure, wherein the parent toxin-II variations have W7Q And/or W30L displacements, wherein residue numbering is according to SEQ ID NO：Depending on 1.
3. separated parent toxin-II variations according to claim 1 or 2, the separated parent toxin-II variations include sequence Row
X1X2X3CX4X5WX6QX7CX8X9X10X11X12CCX13X14X15X16CX17LWCX18KKLX19(SEQ ID NO：432),
X1For G, P, A or missing；
X2For P, A or missing；
X3For S, Q, A, R or Y；
X4For Q, R, K, A, S or Y；
X5For K, S, Q or R；
X6For M or F；
X7For T, S, R, K or Q；
X8For D, T or asparaginyl- -4- butylamines；
X9For S, A, R, I or V；
X10For E, R, N, K, T, Q, Y or glutamyl -4- butylamines；
X11For R or K；
X12For K, Q, S, A or F；
X13For E, Q, D, L, N or glutamyl -4- butylamines；
X14For G, Q or P；
X15For M or F；
X16For V or S；
X17For R, T or N- ω methyl-L-arginine；And
X18For K or R；And
X19For W or L,
Separated parent toxin-II the variations optionally have the extension of N- ends or the extension of C- ends.
4. parent toxin-II variations according to any one of claim 1-3, wherein when residue numbering is according to SEQ ID NO： 1 and timing, the variation is at one or more resi-dues Y1, W7, S11, E12, K14, E17, G18, R22, L29 and W30 With displacement.
5. parent toxin-II the variations according to any one of claim 1-4, the parent toxin-II variations include sequence YCQKWMQTCDSERKCCEGMVCRLWCKKKLW-COOH(SEQ ID NO：416)；Wherein residue Y1, S11, E12, K14, E17, G18, L29 and/or W30 are replaced by following item
A) any other amino acid being shown in Table 1；Or
B) alpha-non-natural amino acid.
6. parent toxin-II the variations according to any one of claim 1-5, the parent toxin-II variations include sequence YCQKWMQTCDSERKCCEGMVCRLWCKKKLL-COOH(SEQ ID NO：422)；Wherein residue Y1, S11, E12, K14, E17, G18, M19, L29 and/or W30 are replaced by following item
A) any other amino acid being shown in Table 1；Or
B) alpha-non-natural amino acid.
7. parent toxin-II the variations according to any one of claim 1-6, the parent toxin-II variations include and SEQ ID NO：The amino acid sequence of 422 (GPYCQKWMQTCDSERKCCEGMVCRLWCKKKLL-COOH) have 90%, 91%, 92%th, the amino acid sequence of 93%, 94%, 95%, 96%, 97%, 98% or 99% homogeneity；Wherein when residue numbering according to SEQ ID NO：1 and timing, the parent toxin-II variations are at position 7 with L with Q and at position 30.
8. parent toxin-II the variations according to any one of claim 1-7, the parent toxin-II variations include sequence root According to the parent toxin-II variations any one of claim 1-5, the parent toxin-II variations include sequence X1X2X3CQKWMQTCDX4X5RX6CCX7X8X9VCRLWCKKKX10X11(SEQ ID NO：737)；
Wherein
X1For G, P, A or missing；
X2For P, A or missing；
X3For S, Q, A, R or Y；
X4For S, A, R, I or V；
X5For E, R, N, K, T, Q, Y or glutamyl -4- butylamines；
X6For K, Q, S, A or F；
X7For E, Q, D, L, N or glutamyl -4- butylamines；
X8For G, Q or P；
X9For M or F；
X10For L, V；And
X11For W or L.
9. parent toxin-II the variations according to any one of claim 1-8, wherein N- ends extension includes SEQ ID NO：372nd, 373,374,375,376,377,378,379,380,381,382,383,384 or 385 amino acid sequence.
10. parent toxin-II the variations according to any one of claim 1-9, wherein C- ends extension includes SEQ ID NO：374th, 386,387,388,389,390,391,392,393,394,395,396 or 397 amino acid sequence.
11. parent toxin-II the variations according to any one of claim 1-10, wherein N- ends extension and/or institute State C- ends and extend through connector and be conjugated to the parent toxin-II variations.
12. parent toxin-II the variations according to any one of claim 1-11, wherein the connector includes SEQ ID NO： 383rd, 392,398,399,400,401 or 402 amino acid sequence.
13. the separated parent toxin-II variations according to any one of claim 1-12, the separated parent toxin-II Variation suppresses the activity of people Nav1.7, its IC50Value is about 3 × 10-8M or smaller, as the IC50It is worth for wherein described IC50Value is There are 25 × 10 in the HEK293 cells for stablizing expression people Nav1.7-6Fluorescence is used in the case of M 3- veratroyl protocevines Resonance energy transfer (FRET) usesTetra membrane depolarizations determination method and when measuring.
14. separated parent toxin-II variations according to claim 13, the separated parent toxin-II variations suppress people The activity of Nav1.7, its IC50Value is between about 3 × 10-8M to about 1 × 10-9Between M.
15. the separated parent toxin-II variations according to any one of claim 1-14, wherein when according to the institute of embodiment 3 State scheme using QPatch determination methods measurement Nav1.7 it is active when, the variation suppress the Nav1.7 activity at least 25%, 30%th, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 91%, 92%, 93%th, 94%, 95%, 96%, 97%, 98%, 99% or 100%.
16. the separated parent toxin-II variations according to any one of claim 1-15, the separated parent toxin-II Variation includes amino acid sequence GPQCX1X2WX3QX4CX5X6X7X8X9CCX10X11FX12CX13LWCX14KKLL(SEQ ID NO： 433), wherein
X1For Q, R, K, A or S；
X2For K, S, Q or R；
X3For M or F；
X4For T, S, R, K or Q；
X5For D or T；
X6For S, A or R；
X7For E, R, N, K, T or Q；
X8For R or K；
X9For K, Q, S or A；
X10For E, Q or D；
X11For G or Q；
X12For V or S；
X13For R or T；And
X14For K or R.
17. the separated parent toxin-II variations according to any one of claim 1-16, the separated parent toxin-II Variation includes SEQ ID NO：30、40、44、52、56、56、59、65、78、109、110、111、114、117、118、119、120、 121、122、123、124、125、126、127、128、129、130、131、132、133、134、135、136、137、138、139、 140、141、142、143、144、145、146、147、148、149、150、151、152、153、154、155、156、157、158、 159、162、165、166、167、168、169、170、171、172、173、174、175、177、178、179、180、182、183、 184、185、186、189、190、193、195、197、199、206、207、208、209、210、211、212、213、214、215、 216、217、218、224、226、227、231、232、243、244、245、247、249、252、255、258、261、263、264、 265、266、269、270、271、272、273、274、275、276、277、278、279、280、281、282、283、284、285、 286、287、288、289、290、291、292、293、294、295、296、297、298、299、300、301、302、303、304、 305、306、307、308、309、310、311、312、313、314、315、316、317、318、319、320、321、322、323、 324、325、326、332、334、335、336、337、339、340、341、342、346、351、358、359、364、366、367、 368、369、370、371、408、409、410、411、412、413、414、415、416、417、418、419、420、421、422、 423、424、425、426、427、428、429、430、431、434、435、436、437、438、439、440、441、442、443、 444、445、446、447、448、449、450、451、452、453、454、455、456、457、458、459、460、461、462、 463、464、465、466、467、468、469、470、471、472、473、474、475、476、477、478、479、480、481、 482、483、484、485、486、487、488、489、490、491、492、493、494、495、496、497、498、499、500、 501、502、503、504、505、506、507、508、509、510、511、512、513、514、515、516、517、518、519、 520、521、522、523、524、525、526、527、528、529、530、531、532、533、534、535、536、537、538、 539、540、541、542、543、544、545、546、547、548、549、550、551、552、553、554、555、556、557、 558、559、560、561、562、563、564、565、566、567、568、569、570、571、572、573、574、575、576、 577、578、579、580、581、582、583、584、585、586、587、588、589、590、591、592、593、594、595、 596、597、598、599、600、601、602、603、604、605、606、607、608、609、610、611、612、613、614、 615、616、617、618、619、620、621、622、623、624、625、626、627、628、629、630、631、632、633、 634、635、636、637、638、639、640、641、642、643、644、645、646、647、648、649、650、651、652、 653、654、655、656、657、658、659、660、661、662、663、664、665、666、667、668、669、670、671、 672、673、674、675、676、677、678、679、680、681、682、683、684、685、686、687、688、689、690、 691、692、693、694、695、696、697、698、699、700、701、702、703、704、705、706、707、708、709、 710、711、712、713、714、715、716、717、718、719、720、721、722、723、724、725、726、727、728、 729th, 730,731,732,733,734,735 or 736 amino acid sequence.
18. the separated parent toxin-II variations according to any one of claim 1-17, the separated parent toxin-II Variation has free C- terminal carboxylics, acid amides, methyl nitrosourea or butyl amide group.
19. a kind of separated fusion protein, the separated fusion protein include being conjugated to half-life extension moiety according to power Profit requires the parent toxin-II variations any one of 1-18.
20. fusion protein according to claim 19, wherein the half-life extension moiety is human serum albumins (HSA), albumin combination domain (ABD), Fc or polyethylene glycol (PEG).
21. a kind of separated polynucleotides, the separated polynucleotide encoding is according to any one of claim 1-18 Parent toxin-II variations.
22. a kind of carrier, the carrier includes separated polynucleotides according to claim 21.
23. a kind of host cell, the host cell includes carrier according to claim 22.
24. a kind of method of the parent toxin-II variations of preparative separation, according to claim 23 the described method includes cultivating Host cell, and the parent toxin-II variations that recycling is produced by the host cell.
25. a kind of pharmaceutical composition, described pharmaceutical composition includes separated according to any one of claim 1-20 Parent toxin-II variations or fusion protein and pharmaceutically acceptable excipient.
26. it is a kind of treat subject Nav1.7 mediation pain method, the described method includes to it is in need thereof by Curer applies a effective amount of parent toxin-II variations or fusion protein according to any one of claim 1-20 to treat The pain.
27. the method according to claim 11, wherein pain are chronic ache, Acute Pain, neuropathic pain, cancer pain Bitterly, nociceptive pain, visceral pain, back pain, postoperative pain, hot pain, phantom limb pain, or with following relevant pain Bitterly：Inflammatory conditions, Primary Erythermalgia (PE), paroxysmal severe pain disease (PEPD), osteoarthritis, rheumatoid arthritis, Neuropathy (PHN) after microendoscopic lumbar discectomy, pancreatitis, fibromyalgia, painful diabetic neuropathy (PDN), bleb, Trigeminal neuralgia (TN), spinal cord injury or multiple sclerosis.
28. according to the method for claim 27, wherein the parent toxin-II variations are periphery administrations.
29. according to the method for claim 28, wherein the parent toxin-II variations are locally applied to joint, spinal cord, outer Section's wound, damage or wound site, peripheral nerve fiber, urogenital organ or Inflamed tissue.
30. according to the method any one of claim 26-29, wherein the subject is people.
31. parent toxin-II variations or fusion protein according to any one of claim 1-20, the parent toxin-II becomes Body or fusion protein are used for the pain for treating subject in need thereof.
32. parent toxin-II variations used according to claim 31, wherein pain are chronic ache, Acute Pain, nerve Property pain, cancer pain, nociceptive pain, visceral pain, back pain, postoperative pain, hot pain, phantom limb pain, Huo Zheyu Following relevant pain：Inflammatory conditions, Primary Erythermalgia (PE), paroxysmal severe pain disease (PEPD), osteoarthritis, class wind It is refreshing after wet arthritis, microendoscopic lumbar discectomy, pancreatitis, fibromyalgia, painful diabetic neuropathy (PDN), bleb Through lesion (PHN), trigeminal neuralgia (TN), spinal cord injury or multiple sclerosis.
33. parent toxin-II the variations used according to claim 31 or 32 the, wherein parent toxin-II variations are peripheries Apply.
34. parent toxin-II the variations used according to any one of claim 31-33 the, wherein parent toxin-II is become Body is locally applied to joint, spinal cord, surgical wound, damage or wound site, peripheral nerve fiber, urogenital organ or inflammation Tissue.
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